What do ASA rules mean for British radio advertisers?

What to take away

How the ASA and CAP regulate British radio advertising

The UK's independent regulator for advertising is the Advertising Standards Authority. It administers the CAP Code for non-broadcast ads and the BCAP Code for broadcast ads, including commercial radio.

Radio sits in the broadcast lane. Ofcom licenses stations, but content standards for ads are handled by the ASA through the broadcast code it inherited from the old broadcast advertising regime. Radiocentre represents commercial radio interests and works with CAP on guidance.

If you are briefing a script, treat the rules and ethics behind the codes as the starting point, not an afterthought once the spot is cut.

Who does what

Complaints can come from listeners, competitors or the ASA's own monitoring. Most radio cases start with a single listener who found a claim hard to believe.

The ASA publishes its decisions in full, so a ruling against your spot stays searchable for years. That alone is a reason to check copy early.

The BCAP Code rules that apply specifically to audio ads

The Broadcast Code sets the content rules for radio advertising, covering recognition of ads, harm and offence, misleadingness, and specific sector sections.

Section 2 on recognition matters in radio because ads must be identifiable as ads. A spot that sounds like a news bulletin or a phone-in can breach that rule even if every fact is accurate.

Section 3 on misleading advertising is the workhorse. It requires that claims be truthful and that anything likely to mislead by omission, ambiguity or exaggeration be avoided.

Section 4 covers harm and offence. In audio, tone, accent and impersonation carry weight that a press ad does not, so a joke that reads fine can land badly when voiced.

Section 9 covers children, and radio has a specific problem here: there is no visual cue separating an ad from programming, so scheduling and content both matter.

Timing and disclosure

Radio spots are short. A 30 second ad gives you roughly 70 to 80 words, which leaves little room for qualifications. The BCAP Code does not excuse a claim because the format is tight.

Prices must be clear. If you say a deal ends soon, the deadline must be genuine. If a price excludes a mandatory fee, say so in the ad.

Before you sign off a script, run a quality checklist over claims, disclaimers and scheduling.

Substantiation: what evidence a radio claim needs

Substantiation means holding evidence that proves the claim before the ad runs. The burden sits with the advertiser, not the broadcaster and not the listener.

A station is not obliged to verify your claims. If the ASA investigates, it asks you for the evidence, and you have a short window to supply it.

Evidence should be independent where possible. A supplier's own marketing deck rarely counts as proof of a comparative or performance claim.

What counts as good evidence

Keep the file even if the campaign ends. Complaints can arrive months after a spot stops airing.

A worked example

Suppose your script says: "Nine out of ten customers would recommend us." Before booking, you need a survey that asked that exact question, a sample big enough to support the figure, and a fieldwork date recent enough to still be true.

If the survey asked "would you buy again" rather than "would you recommend", the claim fails. The ASA reads the claim as a listener would, not as your research team intended it.

If the figure is now three years old, either refresh the research or change the line to something you can stand behind, such as "rated highly by our customers".

The AdviceOnline Library has topic notes that spell out the evidence expected for common claim types, from price comparisons to environmental statements.

Misleading claims, comparisons and superlatives in radio copy

Misleading claims are the single biggest category in radio rulings. Most are not lies, they are claims that overstate what the evidence supports.

A claim misleads if it creates a false impression, even if each word is literally true. Omission counts. So does ambiguity in a line heard once, at speed, in a car.

Superlatives are high risk. "Cheapest", "fastest", "number one" and "best" all need evidence covering the whole market you imply, and the market must be defined.

"Number one" needs a stated basis. Number one for what, measured how, over what period, in which area? If the answer is vague, the claim is misleading.

Comparisons

Comparative claims must compare like with like, on a basis a listener can understand. If you compare your price with a named rival, the rival's product must be genuinely comparable.

Do not pick the most expensive competitor package and compare it with your cheapest. The ASA has repeatedly treated that as misleading.

Comparisons with an unnamed "other leading brand" still need substantiation, and the basis of the comparison should be clear from the ad itself.

Audio-specific traps

Read your script aloud at the pace it will be voiced. If a qualification is hard to catch, it is not doing its job. The advertising rules in England apply across the UK's broadcast market, so a script cleared for one station is not automatically safe on another.

Sector restrictions that bite hardest on radio

Some product categories carry extra BCAP Code rules, and radio's lack of visuals makes several of them harder to satisfy.

Alcohol ads must not imply drinking enhances performance, popularity or confidence, and must not appeal strongly to under-18s. A voice that sounds like a teenager can cause a problem.

Food and soft drink ads aimed at children face restrictions on promoting products high in fat, salt or sugar. Scheduling and tone both count, and radio has no visual separation to help.

Gambling ads must not suggest betting solves financial problems or is a way to make a living. Terms and conditions must be presented clearly, which is difficult in 30 seconds.

Medicines and health claims are tightly drawn. A product licensed for one condition cannot be implied to treat another, and testimonials about serious conditions are restricted.

Financial products need risk warnings where relevant, and claims about returns must be balanced. A rate that applies only to a short introductory period must be described as such.

What this means for script length

Where a sector rule requires a qualification, the qualification is part of the ad, not optional padding. If it will not fit, cut the claim rather than the caveat.

Some advertisers solve this by running a longer spot. Others drop the strongest claim and build the ad around a benefit that needs no qualification.

Your disclosure policy should set out who signs off regulated categories and what evidence is required before a script goes to the station.

Using the ASA Copy Advice service before booking airtime

The Copy Advice service gives free, confidential, pre-broadcast advice on whether a script is likely to breach the codes. It is run by CAP, separate from the ASA's investigations team.

You submit the script and the evidence behind the claims. A response usually comes back within a few working days, which fits most radio booking timelines if you plan ahead.

Copy Advice is not clearance and not a guarantee. It is an opinion on the copy as submitted, and if the ad changes, the advice no longer applies.

How to get a useful answer

Advice is confidential, so a negative response does not become a public ruling. That makes it a low-cost way to test a risky line before a station hears it.

It also helps to submit early. A response that arrives the day before your booking gives you no room to rewrite the script or re-record the voice.

What ASA rulings and sanctions mean for advertisers

The ASA rulings database publishes every upheld and not upheld decision, searchable by advertiser, sector and medium. Radio cases appear alongside TV, press and online.

A ruling names the advertiser and describes the ad. It requires you to withdraw or amend the ad, and it stays online, which means competitors, journalists and procurement teams can find it.

Most rulings are resolved without further action. The ASA publishes, the advertiser complies, and the matter ends there.

When sanctions follow

If an advertiser does not comply, or breaks the same rule repeatedly, the ASA moves to sanctions. The ASA sanctions information page explains the escalating options available.

These include requiring the advertiser to have future ads pre-cleared, and, for persistent offenders, placing paid search ads that name the advertiser when someone searches its brand.

Broadcasters can also be directed to withhold airtime from an advertiser that will not comply. For a radio campaign, that means losing the channel entirely.

Practical due diligence

Before you book, search the rulings database for your own brand and for the claims you plan to make. A claim already ruled against is a warning, not a template.

Check competitors too. If a rival's comparison was upheld against them, that tells you how the ASA reads that style of claim in your sector.

Keep scripts, evidence and Copy Advice responses together for at least two years. If a complaint lands, you will want the file within days, not weeks.

Common questions