How UK TV Ads Move From Script to Broadcast Clearance

Devon Ariza 20 August 2026

How UK TV ads move from script to broadcast clearance

Clearcast approval in plain English

Clearcast is a private, non-governmental organisation that reviews advertisements before transmission on behalf of participating UK broadcasters. It is best known for pre-clearing most UK television commercials—not every advert in the UK or every placement on every platform. Clearcast conducts BCAP Code compliance work for broadcasters within its remit, but it does not create the rules or act as the regulator (LexisNexis overview of the Clearcast clearance process).

Short answer: Clearcast checks whether a proposed UK TV commercial meets the applicable broadcast advertising rules. It may approve the material, ask for evidence or revisions, or attach timing and scheduling conditions.

Approval happens in stages. A script can be approved as the basis for production, but that does not mean it is ready for transmission. The completed commercial must still receive final clearance in its finished form. “Clearcast approval” may therefore refer either to approval at a particular production stage or, more specifically, to final pre-broadcast clearance.

Nor is it a promise that the advert is immune from complaints or later regulatory action.

Clearcast describes its route to approval as a three-stage process (Clearcast’s clearance overview). In production practice, this usually means reviewing the proposed script, an emerging rough cut and the final commercial. Starting before filming allows the reviewer to consider the precise claims, intended visuals, demonstrations and qualifications before changes become expensive.

The practical purposes are to:

help participating broadcasters meet their compliance responsibilities;
identify unsupported or potentially misleading claims;
resolve problems before filming, animation and final editing;
reduce the risk of an unsuitable commercial reaching air; and
identify any timing or scheduling conditions before media plans are finalised.

Clearcast may ask for documentary support, require wording or imagery to change, assess a cut against an approved script, approve the finished commercial or hold a decision until outstanding questions have been resolved.

Clearcast, the ASA, BCAP and Ofcom do different jobs

Clearcast is sometimes casually described as “the regulator”, but that collapses several different roles. The UK system separates pre-broadcast review, advertising codes, complaints and enforcement, statutory oversight, and the broadcaster’s decision to transmit.

Organisation or code	Function	Stage of involvement
Clearcast	Reviews adverts before transmission for participating broadcasters; may approve them, ask questions, request changes or apply restrictions	Before transmission
BCAP Code	Supplies the rules principally governing broadcast advertising, including television commercials	Creative development, clearance and complaint assessment
CAP Code	Supplies rules for non-broadcast advertising and may apply to video-on-demand or other non-broadcast placements	Creation, placement and post-publication enforcement
ASA	Investigates complaints and enforces the CAP and BCAP Codes	Usually after publication or transmission, although its guidance also informs production
Ofcom	Provides statutory oversight within the broadcast regulatory framework	System oversight rather than routine commercial clearance
Broadcaster or platform	Decides whether it will accept, schedule and carry an advert under its requirements	Before and during transmission or publication

Clearcast pre-checks the advert

Clearcast reviews proposed commercials for participating broadcasters. It applies the relevant advertising rules but does not write them or replace the bodies responsible for the wider regulatory system.

A broadcaster within Clearcast’s remit may require an advert to be submitted for approval as a condition of acceptance (LexisNexis overview of the Clearcast clearance process). Clearance can therefore be operationally essential for a particular booking even though it is not a universal government licence for UK advertising.

The BCAP Code is the broadcast rulebook

Television commercials are primarily assessed against the UK Code of Broadcast Advertising, commonly called the BCAP Code. Its concerns include misleading advertising, substantiation, harm, offence, protection of children, restricted categories and scheduling.

The key distinction is between the rules and the organisation conducting the pre-check. The BCAP Code provides the broadcast rules; Clearcast assesses proposed advertising against them for the broadcasters it serves.

The CAP Code covers non-broadcast advertising

The CAP Code generally governs non-broadcast advertising. Depending on the service and placement, it may apply to video-on-demand or other online advertising.

A commercial accepted for television should not automatically be treated as cleared for every streaming service, website, paid-social placement or creator-led campaign. The creative may be identical, but the applicable code, platform policy, targeting, disclosure obligations and approval route can differ.

The ASA investigates complaints and enforces the codes

The Advertising Standards Authority investigates complaints and enforces the CAP Code for non-broadcast advertising and the BCAP Code for broadcast advertising. Its responses can include requiring an advert to be amended or withdrawn and escalating a matter through the wider enforcement system (LexisNexis legal glossary on the ASA’s role).

This is why “Clearcast approved” does not mean “the ASA can never rule against it”. Clearance is a preventive assessment based on the material, evidence and intended context submitted at the time.

Ofcom provides statutory oversight

It does not routinely conduct the script, rough-cut and final-commercial reviews described in this guide. The ASA administers the advertising codes under arrangements recognised by Ofcom, while Clearcast performs pre-clearance work for participating broadcasters (LexisNexis legal glossary on the ASA’s role).

The useful shorthand is:

Clearcast pre-checks; BCAP or CAP supplies the relevant rules; the ASA handles complaints and enforcement; Ofcom provides statutory broadcast oversight; and the broadcaster controls transmission.

Which adverts fall within Clearcast’s remit?

Clearcast is the principal pre-clearance route for most television advertising carried by participating UK broadcasters. That does not mean every television channel, on-demand service, website, social platform, radio station or cinema follows the same process.

The ASA describes Clearcast as operating the clearance system for television and video-on-demand commercials, checking television adverts against the BCAP Code and sometimes applying timing or scheduling restrictions (ASA resource on Clearcast’s role). The exact operational requirement still depends on the broadcaster or service carrying the advert.

Placement	Should Clearcast approval be assumed?	Practical action
Linear television	Often required by participating broadcasters	Confirm the chosen broadcaster’s current clearance and delivery requirements
Participating video-on-demand service	Do not assume; coverage and the applicable code depend on the service	Ask whether Clearcast review is required and whether an existing television clearance applies
Other online video	Do not assume that TV clearance applies	Check the publisher, advertising network or platform rules and the applicable non-broadcast code
Social media and paid social	TV clearance is not sufficient by default	Follow platform policies, applicable CAP requirements and disclosure obligations
Radio	Do not assume that the television route applies	Confirm the radio clearance process
Cinema	Do not assume that the television route applies	Confirm the distributor’s or exhibitor’s approval process
Brand-owned organic video	TV clearance is not sufficient by default	Assess the claims, commercial context and placement under the applicable rules

Linear television

For a commercial intended for a participating television broadcaster, involve the broadcaster or media buyer early. Establish whether Clearcast clearance is required, who will control the relevant account and who will submit each version.

The practical consequence of the broadcaster’s arrangements may be that an uncleared commercial cannot be accepted for transmission. That is different from saying that every UK advert must, as a matter of universal law, carry a Clearcast licence.

Video on demand

Video-on-demand is especially prone to false assumptions. Clearcast operates in this area, but the route and applicable code depend on the service and placement. Television clearance should not be assumed to transfer automatically.

Ask four questions before production:

Which exact on-demand service will carry the advert?
Which advertising code applies to that placement?
Does the service require Clearcast review?
Does an existing television approval cover this version and use?

A “TV and streaming” line in a media plan is not precise enough to answer those questions.

Other digital and offline media

A social cut-down, website video, influencer advert, radio spot or cinema edit may repeat the television commercial’s central claim. That does not make television clearance the applicable or sufficient route.

Retain the supporting evidence and preserve necessary qualifications across formats, but assess every placement on its own terms—particularly where the audience, edit, offer, call to action or surrounding context changes.

Confirm the current position with the intended broadcaster, platform, media buyer or Clearcast before committing production spend; the available evidence does not establish a definitive current service list.

The clearance process from script to final commercial

Clearcast describes clearance as a three-stage process (Clearcast’s clearance overview). Production practitioners commonly identify those stages as the script, rough cut and final commercial. The workflow follows the natural order of production, but it should influence creative development from the outset rather than being added after the edit.

Stage 1: Submit a camera-ready script

The initial submission should let a reviewer understand what viewers will hear, see and take away. A camera-ready script normally includes:

every line of dialogue and voiceover;
descriptions of action and setting;
product shots and demonstrations;
graphics and captions;
objective claims;
prices and promotional terms;
testimonials or endorsements;
qualifications and limitations;
proposed legal or explanatory text; and
supporting evidence for relevant claims.

“Product shown in use” is not an adequate visual description when the nature of that use affects the claim. Explain what happens, what result appears and how the sequence will be presented.

The reviewer may approve the script for production, return it with questions, request changes or hold it while documentary substantiation is considered. Script approval gives the production a working compliance basis; it is not final permission to transmit, and it does not cover an improvised stronger claim added during filming.

Space City’s practitioner account describes a camera-ready script containing voiceover, visuals, graphics and legal text, followed by requests for changes or evidence where needed (Space City’s description of the clearance stages). Its recommendation to submit before filming is practical guidance rather than an official service guarantee.

Stage 2: Review a rough cut

A rough cut lets the reviewer compare the emerging advert with the approved script. It may reveal issues that were not obvious on the page:

a qualification sounds detached from the main claim;
editing exaggerates the speed or scale of a result;
important text disappears too quickly;
a demonstration differs from its submitted description;
surrounding images alter the meaning of a testimonial;
movement or poor contrast obscures a limitation; or
new wording, pack claims or graphics have been introduced.

The evidence describes rough-cut review as commonly used and valuable, but does not establish that it is mandatory in every case. Confirm what the campaign requires.

Submit the rough cut when it represents the intended commercial accurately but remains economical to change. Waiting until grading, final sound, animation and talent approvals are complete reduces the team’s ability to respond.

Stage 3: Submit the final commercial

The final submission is the completed, timed advert with its definitive:

pictures and edit;
voiceover, dialogue, music and sound effects;
pack shots and demonstrations;
prices and offer details;
supers, qualifications and legal text; and
end frame and call to action.

The final review assesses the commercial viewers would actually see, not the production’s intentions.

Production practitioners associate final approval with a clocked commercial used for broadcaster identification. Because the precise rules for clock numbers and replacement versions may change, confirm them against current Clearcast and broadcaster requirements rather than relying on a generic rule.

Clearance is not the whole delivery process

Content clearance sits alongside:

technical quality control;
file encoding and format compliance;
duration and audio checks;
flashing-image safety checks;
subtitles and audio description;
accessibility preparation;
media instructions;
commercial identification and version control; and
delivery to broadcasters.

Clearcast provides tools relating to flashing images and superimposed text, confirming that these matters can form part of the wider review workflow. Even so, content clearance, technical acceptance, accessibility and delivery are not interchangeable. An advert may be cleared in content terms but still require technical work; a technically valid file is not necessarily cleared to air.

Assign named owners for clearance, technical QC, accessibility, media instructions and delivery. Otherwise, each supplier may assume another has completed the final dependency.

What to prepare before submitting an advert

A useful submission does not bury a disputed statement in an evidence dump. It connects every objective claim to material that supports the exact wording and overall impression.

Script-stage checklist

Give the producer or account manager a package containing:

[ ] Campaign name, advertiser and product
[ ] Intended broadcaster, service and placement
[ ] Proposed duration and all planned versions
[ ] Full dialogue and voiceover
[ ] Shot-by-shot visual descriptions
[ ] Product demonstrations and depicted outcomes
[ ] Graphics, captions, pack claims and end frames
[ ] Prices, savings and promotional statements
[ ] Offer dates, eligibility conditions and exclusions
[ ] Testimonials, endorsements and their context
[ ] Qualifications and proposed legal text
[ ] Documentary substantiation mapped to each objective claim
[ ] Known audience, programme or scheduling considerations
[ ] A named contact authorised to answer questions

Evidence must support the claim actually communicated, not merely a broader proposition about the product. Evidence that a product “can help” under limited conditions may not support an unqualified promise that it “works” for everyone.

Index the evidence by claim:

Claim	Where it appears	Evidence owner	Supporting material	Qualification
“Lasts all day”	Voiceover and end frame	Product team	Test method and results	Relevant usage conditions
“50% off everything”	Opening graphic	Retail team	Pricing and promotion records	Dates and exclusions
Testimonial result	Presenter line	Agency	Source record and evidence for objective element	Results context

This is workflow guidance, not a prescribed Clearcast form. Its purpose is to expose missing support before the review does.

A bounded retail example

Suppose the script says, “50% off everything this weekend.” The team should be prepared to establish:

the pricing basis used to calculate the saving;
which products are included;
whether any lines, locations or customers are excluded;
the start and end of the promotion;
whether availability is limited; and
which qualifications are necessary to avoid a misleading impression.

Evidence showing that some items are reduced by 50% does not support “everything”. If the evidence supports only “up to 50% off selected lines”, write that claim before filming rather than attempting to repair the broader promise with dense small print.

A bounded performance or health example

Suppose a commercial says that a product “relieves symptoms in minutes” while showing an immediate transformation. The claim may be delayed, challenged or narrowed if the evidence does not support the precise timeframe, relevant users, conditions of use and accompanying visual impression.

The answer is not necessarily to add a disclaimer. The spoken line, demonstration and qualifying text must work together.

Sensitive or regulated categories may need additional assessment, but requirements vary by product and claim. Obtain specialist input instead of generalising from another campaign.

Rough-cut checklist

At rough-cut stage, check that:

[ ] Spoken wording matches the approved script
[ ] Ad-libs and alternative takes have been identified
[ ] The visual sequence matches its submitted description
[ ] Demonstrations do not overstate the supported result
[ ] Prices, dates and offer mechanics remain consistent
[ ] Qualifications appear with the claims they qualify
[ ] Important text is legible and not obscured
[ ] Testimonials retain their approved meaning
[ ] Pack shots introduce no new claims
[ ] Sound and editing do not materially alter the message
[ ] Scheduling conditions are understood by the media team

Mark compliance-critical wording and qualifications in the edit script and version notes. Do not expect the editor to infer them.

Final-commercial checklist

Before final submission, confirm that:

[ ] Pictures, voiceover and sound are locked
[ ] Approved wording remains unchanged
[ ] Every qualification and legal line is present
[ ] Prices and promotion dates are current
[ ] The final pack and product are correct
[ ] No alternative end frame introduces a new claim
[ ] The timed duration is correct
[ ] Requested evidence and documentation remain available
[ ] Version names and identifiers are unambiguous
[ ] Technical QC, accessibility and delivery have separate owners

Exact font sizes, line counts, hold times, file formats and technical thresholds are deliberately omitted because current official technical requirements are not included in the evidence pack. Use the current requirements for the intended broadcaster and delivery route.

What Clearcast checks and what decisions it can make

Clearance is not a search for prohibited words. The likely meaning of a commercial comes from the entire presentation: claims, images, demonstrations, pace, qualifications, audience and placement.

Claims and substantiation

Review concerns can include:

potentially misleading statements;
comparisons and superiority claims;
prices and savings;
promotional mechanics;
product performance;
testimonials and endorsements;
health or efficacy statements;
omissions of material information; and
qualifications that contradict rather than clarify the main claim.

Evidence should fit the population, product version, conditions, timeframe and degree of certainty communicated by the advert.

Testimonials require the same discipline.

Audience protection

The BCAP framework includes recurring concerns involving harm, offence and the protection of children.

Scheduling can affect acceptability. An advert may be allowed only at certain times or away from particular programmes rather than rejected outright. Clearcast may apply timing and scheduling restrictions as part of clearance (ASA resource on Clearcast’s role).

Presentation and overall impression

Ask:

Is important text legible in the intended presentation?
Does it remain visible long enough to be understood?
Is the qualification close to the claim it qualifies?
Do movement, contrast or competing graphics interfere with it?
Does the demonstration represent the supported use?
Does the edit imply unsupported causation, speed or scale?
Does the soundtrack change the apparent meaning or urgency?

Technical and production consistency

The final commercial should remain consistent with the approved script and any reviewed cut. Relevant issues include the treatment of supers, flashing-image risk and whether the finished audiovisual execution changes the approved proposition.

This does not eliminate the need for separate technical QC and delivery. Some checks touch both compliance and file acceptance, but those workflows remain distinct.

Possible decisions

A submission may receive:

Approval — the material is acceptable for the stated use or production stage.
A request for revisions — wording, visuals, qualifications or presentation must change.
A request for substantiation — more or better evidence is needed.
Conditional approval — the advert may run subject to timing, audience or programme-related restrictions.

Pass every condition to the media buyer. Otherwise, a cleared commercial may still conflict with the booked schedule.

Regulated or sensitive categories can raise additional evidence, content and scheduling questions. Do not assume that a restriction applied to one alcohol, gambling, finance, food or health-related campaign will apply identically to another. The product, claim, audience, execution and current rules all matter.

Timelines, revisions and avoiding expensive delays

The available evidence does not establish a guaranteed official turnaround time. An end-to-end schedule must account for questions, evidence review, internal decisions, revised creative and final processing—not just the time Clearcast spends looking at each submission.

Space City recommends allowing roughly two weeks for script clearance, while Happy Hour Productions recommends allowing at least 15 working days from initial submission to broadcast (Happy Hour Productions’ practitioner timeline). These are commercial practitioners’ planning estimates, not official Clearcast service standards or guarantees.

Allow more time when:

the product category is sensitive or heavily regulated;
claims depend on complex technical evidence;
a promotion has numerous conditions or exclusions;
the script is still changing internally;
multiple versions or durations are planned;
more substantiation is requested;
client, legal and agency approvals are slow;
the rough cut departs from the approved script; or
submission falls during a busy period.

A practical sequence

A lower-risk schedule is:

Confirm the placement and clearance route.
List each objective claim and assemble its support.
Submit the camera-ready script.
Resolve questions, qualifications and likely scheduling conditions.
Lock the approved wording and visual proposition.
Film or animate the commercial.
Use rough-cut review where appropriate.
Make required changes before costly finishing work.
Submit the completed, timed commercial.
Record final approval and every condition.
Complete technical QC and accessibility work.
Deliver the correct version with accurate media instructions.

Some tasks can overlap, but production should not move so far ahead that a clearance decision becomes prohibitively expensive to implement.

Common causes of delay

Unsupported claims. A marketing deck, supplier email or broad research summary may not prove the statement made in the commercial.

Incomplete offer information.

Late voiceover changes. A small copy edit can turn a qualified statement into an absolute one.

Different visuals. The filmed demonstration may imply a result that the submitted script never described.

Unreadable qualifications.

Version confusion. The agency, post house and media buyer may each hold a different “final” file.

Failure to carry wording through. A cleared limitation disappears during client revisions or edit compression.

Changes after approval

Material changes may require renewed review. Practitioner sources also associate some revised versions with a new clock number, but the exact threshold is not established consistently in the available evidence. Confirm the current rule with Clearcast rather than assuming either that every microscopic correction requires a new identifier or that only major creative changes matter.

Flag any change to:

claims or qualifications;
voiceover or dialogue;
prices, dates or offer conditions;
testimonials;
demonstrations or product imagery;
end frames and calls to action;
duration or sequence; and
scheduling-relevant content.

Maintain a version log showing what changed, who approved it and whether it was resubmitted.

A pre-submission checklist for brands and production teams

Use this master checklist in the campaign brief or production schedule.

Before scripting

[ ] Identify each broadcaster, on-demand service and other placement.
[ ] Confirm the applicable code and clearance route for each placement.
[ ] Ask the media buyer about scheduling and delivery dependencies.
[ ] List every factual, comparative, price, performance and efficacy claim.
[ ] Assign an evidence owner to each objective claim.
[ ] Confirm the exact product, price, offer period and audience.
[ ] Identify potential sensitive-category or child-audience concerns.
[ ] Build time for questions and revisions into the schedule.

Before filming

[ ] Submit a complete camera-ready script, not a dialogue-only draft.
[ ] Describe demonstrations, transitions, graphics and end frames.
[ ] Supply indexed, claim-by-claim substantiation.
[ ] Obtain and understand script-stage feedback.
[ ] Resolve qualifications instead of postponing them until editing.
[ ] Share scheduling conditions with the media team.
[ ] Lock compliance-critical wording in the shooting script.
[ ] Do not film a disputed claim as if approval were certain.
[ ] Plan alternatives where a decision remains open.

During editing

[ ] Compare the cut line by line with the approved script.
[ ] Check that demonstrations match their submitted descriptions.
[ ] Preserve the meaning and prominence of qualifications.
[ ] Make important text readable in the intended presentation.
[ ] Recheck prices, dates, availability wording and exclusions.
[ ] Identify new pack claims, captions, ad-libs or voiceover.
[ ] Ensure pace and juxtaposition do not exaggerate the message.
[ ] Use rough-cut review where appropriate.
[ ] Record each version and the reason for every change.

Before final submission

[ ] Confirm the final voiceover, dialogue, pictures and sound.
[ ] Verify that testimonials retain the approved presentation.
[ ] Check all qualifying and legal text against approved material.
[ ] Confirm prices and offer dates are still correct.
[ ] Verify the intended duration and version.
[ ] Include or retain all requested evidence and documentation.
[ ] Flag every post-script change.
[ ] Record timing, audience or programme restrictions.

Before delivery

[ ] Confirm final content clearance for the exact version.
[ ] Complete technical quality control separately.
[ ] Complete required accessibility preparation.
[ ] Check identifiers, filenames and version records.
[ ] Give the media buyer the approved version and restrictions.
[ ] Complete broadcaster delivery and media instructions.
[ ] Retain the approved script, evidence and decision history.

If feedback is unclear or commercially significant, ask Clearcast for clarification. If a disputed claim, sensitive category or high-value campaign creates material legal or regulatory risk, obtain specialist advice rather than treating this educational guide as legal advice.

The central production principle is simple: clear the claim and script before committing the production budget.

Frequently asked questions

Is Clearcast a government regulator?

No. Clearcast is a private, non-governmental pre-clearance organisation working for participating broadcasters. It reviews advertising against applicable rules but does not create those rules or replace the ASA and Ofcom in the wider regulatory system.

Is Clearcast approval legally required for every UK advert?

No. There is no universal Clearcast requirement covering every UK advert or medium. Participating broadcasters may require clearance as a condition of accepting television advertising, making it operationally essential for those placements. Other broadcasters, on-demand services, online platforms, radio and cinema may use different routes.

Can the ASA investigate an advert after Clearcast has approved it?

Yes. The ASA can investigate complaints and may require advertising to be amended or withdrawn. Clearcast approval records a pre-broadcast assessment; it does not guarantee that no complaint will be upheld.

How long should a team allow for Clearcast clearance?

There is no guaranteed duration established by the available evidence. Commercial production practitioners suggest planning for roughly two weeks or about 15 working days, but complex evidence, sensitive categories, multiple versions, revisions and busy periods can extend the process. Treat those figures as planning guidance, not official service standards.

Does changing an approved advert require fresh clearance?

A material change may require review of the revised commercial, and some changes may affect its clock identifier. Always flag changes to claims, qualifications, prices, dates, voiceover, visuals, testimonials, duration or offer mechanics. Confirm the current resubmission and clock-number requirements with Clearcast for the particular version.

Clearcast should be treated as an early production checkpoint, not a rubber stamp added after editing. Confirm the route for the intended broadcaster or on-demand service, submit the script and substantiation before filming, preserve approved wording throughout the edit and allow room for questions or restrictions. Approval reduces pre-broadcast compliance risk, but advertisers and broadcasters must still account for applicable codes, technical delivery requirements and possible later ASA scrutiny.