What Is Pre-Flight Clearance (Clearcast)?

Pre-flight clearance with Clearcast is the process of getting UK television commercials approved against the UK Code of Broadcast Advertising (BCAP Code) before they can be transmitted.^[1] It is a licence condition for broadcasters that ads must not mislead, cause harm or offend, so they rely on Clearcast to check compliance prior to broadcast.^[2] For advertisers and agencies, successful pre-flight clearance is a critical step in taking a TV commercial from offline edit to air date without last‑minute compliance issues.

What Clearcast pre-flight clearance is and why it matters

Clearcast is a non-governmental clearance body owned by major UK commercial broadcasters, including ITV, Channel 4 and Sky.^[2] It operates the system that checks television ads against the BCAP Code before they are shown, acting on behalf of broadcasters who remain legally responsible for compliance with Ofcom’s Broadcasting Code and their licence conditions.^[1][2][3] Pre-flight clearance significantly reduces the risk of ads being rejected close to transmission, pulled after complaints, or ruled against by the Advertising Standards Authority (ASA) for breaches such as misleading claims, offence or harm.^[3]

The BCAP Code, administered by the ASA and written by the Broadcast Committee of Advertising Practice, sets detailed rules for broadcast advertising on issues such as misleadingness, harm, offence, children, health and environmental claims.^[3] Ofcom’s Broadcasting Code adds further content and scheduling restrictions for broadcasters.^[4] Clearcast checks each submitted script and film against these rules, and issues approval, conditions or rejections that broadcasters rely on when deciding whether, and how, to carry a commercial.^[1][2][3]

How the Clearcast submission and review process works

Advertisers or agencies submit material to Clearcast at two main stages. First, they provide pre-production scripts or storyboards so issues can be addressed before production spend is committed.^[5] Second, they submit the finished commercial for pre-transmission clearance.^[5] Submissions typically include substantiation for claims, legal clearances such as music and talent, and any required technical information. Clearcast staff review these materials line by line against relevant BCAP rules, then issue feedback via an online system used by agencies and broadcasters.^[1][2][5]

Clearcast does not publicly guarantee a specific turnaround time, but its own guidance stresses the need for early submission and adequate lead time, particularly in restricted categories such as alcohol, gambling, pharmaceuticals or foods high in fat, salt or sugar.^[5] In practice, agencies often plan several working days for relatively straightforward approvals, and longer where complex substantiation or legal review is needed. Late changes, missing evidence or complex ASA/CAP Code issues can extend the process, so aligning production schedules with clearance milestones is a key part of campaign planning.

Once an ad is approved, Clearcast also issues timing and scheduling restriction advice, for example watershed guidance where content might not be suitable for children.^[1][2] Broadcasters are strongly recommended by BCAP to follow such scheduling advice, although this does not guarantee compliance, and ultimate responsibility for any breach rests with the broadcaster and advertiser.^[1][3] Clearcast may also help defend ASA complaints for ads it has cleared, providing background on the decisions and evidence considered.^[3]

Common rejection issues in pre-flight clearance

Clearcast rejections or conditional approvals often relate to misleading claims, inadequate substantiation, inappropriate targeting or offence.^[3] For example, objective performance or savings claims must be backed by robust evidence that is supplied at submission stage, in line with BCAP rules on substantiation.^[3] Ads that omit material information, exaggerate typical results or imply unsupported comparisons with competitors are likely to be queried or refused until the claims or evidence are clarified.

Other common issues involve protection of children, portrayal of health and medical treatments, and sensitive sectors such as gambling or financial services.^[3] Ads that could encourage dangerous behaviour, irresponsible use of products or unrealistic body ideals can raise concerns under BCAP’s harm and offence rules. Technical matters also feature, such as flashing imagery that might affect viewers with photosensitive epilepsy, or unclear superimposed text for qualifications.^[5] Systematically mapping concepts, claims and visuals against BCAP sections while the TVC is in development usually reduces friction in pre-flight clearance.

Even after a Clearcast approval, the ASA can still uphold complaints and rule that an ad must not appear again in its current form.^[3] In such cases, broadcasters are expected under the BCAP Code and Ofcom’s Broadcasting Code to stop carrying the commercial.^[3][4] For this reason, many advertisers treat Clearcast feedback not as a minimal hurdle but as an opportunity to stress-test the creative and ensure it is robust to likely regulatory and public scrutiny.

AI-generated content and Clearcast’s current stance

While Clearcast has not published a stand-alone rulebook for artificial intelligence, any AI-generated content in TV ads is assessed under the same BCAP principles of misleadingness, harm, offence and social responsibility.^[3] This includes synthetic actors, voice cloning, AI-generated testimonials and composited imagery. Advertisers remain responsible for holding evidence that what is shown or claimed is not misleading, regardless of how it is produced. If AI is used to imply events, endorsements or product performance that have not occurred, this is likely to trigger queries under the BCAP rules on truthfulness and substantiation.^[3]

The wider UK regulatory framework is already signalling expectations around AI, disclosure and audience understanding. CAP and BCAP have consulted on the application of existing rules to AI tools, including transparency where artificially generated material could materially mislead viewers.^[3] In parallel, Ofcom has highlighted concerns about synthetic media and viewer trust in content across audiovisual services.^[4] In practice, agencies planning AI-led creative should build in extra time for clearance, prepare clear explanations of what in the ad is synthetic, and consider whether explicit disclosure, as discussed in AI disclosure in advertising, would reduce the risk of complaints or regulatory challenge.