How to write a radio ad script UK listeners will act on

What to take away

UK commercial radio scripts are cleared against the BCAP code before broadcast, so claims, prices and testimonials need evidence from the first draft.
One script carries one action. A second prompt splits response and muddies the result.
Write to the booked slot length, then cut words rather than speed up the read.
Prices belong in pounds, spoken the way customers say them out loud.
The same skeleton reworks for podcast and streaming slots with small edits.

Decide the single action first

Agree what a listener should do before you draft a line, and where they will do it. A phone number suits a service business with staffed lines; a short web address suits a retailer without a call centre.

Pick the right call to action

Does the business have staffed phone lines?

Yes

Use a phone number

Use a short web address

The format you buy shapes that action, and our guide to audio ad formats UK listeners actually respond to sets out what a produced spot, a presenter read and a listener competition each expect from the script.

Write the call to action as one sentence, then build the script backwards from it. If the action cannot be spoken clearly in a few seconds, the script is doing too much.

Keep the words inside BCAP rules

Radio advertising in the UK is covered by the BCAP code, administered by the Advertising Standards Authority alongside the CAP code for non-broadcast media. Comparative claims, testimonials and promotion conditions need substantiation, and the audio itself must carry any qualification.

BCAP script compliance checks

Substantiate comparative claims and testimonials
State promotion conditions in the audio
Carry any qualification in the audio itself
Settle claims early to avoid missed bookings
Explain data handling on the landing page

Commercial stations hold Ofcom licences granted under the Broadcasting Act 1990, and their compliance teams clear spots before transmission. A script that needs repeated rewrites can miss a booking, so settle claims early.

If the call to action gathers listener data, through a text-back or a competition entry, that handling falls under UK GDPR. The ad can stay short, but the landing page must explain what happens to the data.

Build the script in six passes

Work through these in order with the stopwatch nearby.

Open with the listener's problem or the offer, not company history.
Name the business and what it sells inside the opening lines, because listeners join mid-break.
Add one proof pointa price in pounds, a guarantee, a location or a named service.
Write the call to action exactly as it will be spoken, with the number or address.
Read the draft aloud, cut every stumble, then time it against the booked slot.
Note the script version, station and airtime, so later results can be tied to what ran.

The four jobs below apply to any length of slot.

Time in the slot / Job

Opening five seconds: Hook · The problem or the offer, spoken plainly
Next seven seconds: Brand · Business name, town or service area, what you sell
Middle: Proof · Price in pounds, guarantee, opening hours or a named product
Close: Action · One instruction: phone number, web address or search term

Sound British, price in pounds

Print copy read aloud rarely works. Spoken English uses shorter clauses and contractions, so 'book your MOT online' lands better than 'MOT bookings may be made online'.

Give every price a currency frame. 'From £49' reads clearly, while a bare '49' can sound like a model number. If the price is a headline claim, say whether VAT is included, since a listener cannot read small print.

Match the station's tone as well. A speech-led local station carries a conversational read; a music-led format needs the message to land in fewer, shorter lines.

Reuse the script without rewriting it

Once a spot works on air, the same skeleton fits a podcast or streaming slot. Keep the hook and the action, then rewrite the middle. A podcast listener arrives with different attention, so the proof point has to change even when the offer does not.

Host-read spots are written to sound unscripted, which changes how the call to action is paced. Our guide to podcast advertising regulations in the UK covers the extra compliance points.

Common questions

How long should a radio ad script be?

Write to the slot you have booked, then test it out loud. Slots are sold in set lengths, and a read that overruns gets cut at clearance or rushed on air. Cutting a sentence beats speeding one up.

Do I need a professional voice artist?

Not necessarily. An owner reading their own script can sound credible on a local station, but a voice artist handles timing and the pronunciation of numbers, postcodes and web addresses more reliably. Decide before you write, because the wording changes.

Can one script run on national and local stations?

Rarely without edits. A national spot cannot name a single town or branch, while local listeners expect exactly that. Keep a master version, then cut a local one with the town, opening hours and nearest branch.

What makes a radio call to action work?

One instruction, said clearly, with no competing prompt in the same spot. Put it at the end, after the proof point, so the listener already knows why they should act.