Seven checks that make radio advertising agency reviews credible

What to take away

Most teams read agency reviews for reassurance, then book airtime. The mistake is treating a review as proof of performance when it is only a method.
This review assessed published review criteria, scoring transparency and evidence trails. It did not test any agency, run campaigns or interview staff, so nothing here is hands-on testing.
Vendor claims (reach, response rates, awards) are labelled as claims. Independent evidence means regulators, published codes and audited audience data.
A credible review states what it scored, how it weighted each item, and what it refused to score at all.
England agencies sit under the same ASA and CAP regulatory framework as national buyers, so code compliance is a fair review criterion.

Why most agency reviews fail a buyer

Ask a media buyer what they want from a review and they will say confidence. Confidence is not evidence. A review that lists strengths without naming the scoring weights tells you the author had an opinion, not a method.

The second failure is scope. A review of creative production, media planning and buying in one document usually assesses none of them properly. Split the brief before you read anything, then check whether the review matches what you actually need.

What was assessed here, and what was not

Assessed vs Not Assessed

Assessed

Criteria: Published review criteria
Scores: Reproducible scoring
Claims: Sourced claims
Limits: Named limits
Rules: England airtime rules

Not assessed

Criteria: Agency performance
Scores: Campaign results
Claims: Pricing accuracy
Limits: Client satisfaction
Rules: No airtime bought

Not assessed: agency performance, campaign results, pricing accuracy or client satisfaction. No agency was briefed, no airtime was bought, and no staff were interviewed for this piece. Where a review quotes a vendor figure, we treat it as a claim until a named source dates it.

That distinction matters commercially. The comparison methods guide sets out how to weight criteria before you score anything, which is the step most shortlists skip.

The seven checks

Scope statement. Does the review say which services it covers and which it ignores?
Scoring weights. Are the weights published, or does the total appear from nowhere?
Evidence type. Is each claim tagged as vendor, regulatory or independently measured?
Source dates. Undated audience or response figures cannot be checked.
Regulatory fit. Reviews should reference the codes that bind radio and digital ads.
Conflicts. Does the reviewer or their employer sell anything the review recommends?
Refresh date. A review older than the current trading year is a starting point, not a verdict.

How to read vendor claims

Agency decks are marketing documents. Treat reach, frequency and response figures as claims unless a named, dated source sits beside them. For digital elements of a radio buy, the Google Ads optimisation guidance is a useful benchmark for what good practice looks like, though it does not validate any agency.

For compliance claims, the ICO direct marketing checklist is the test to apply to consent and data handling. If a review does not mention consent mechanics, its compliance score is guesswork.

Glossary

Scoring weightthe share of a total score a single criterion carries.
Evidence trailthe named source and date behind a claim.
Vendor claima figure published by the seller, not independently measured.
Scope statementthe services a review does and does not cover.
Refresh datewhen the reviewer last checked the criteria against current rules.

Common questions

Can a review tell me which agency performs best?

No. A review can compare published criteria and evidence quality. Performance depends on your brief, budget and market, none of which a general review can measure for you.

Should I trust awards listed in a review?

Treat them as vendor claims unless the awarding body and year are named. Awards show recognition, not fitness for your campaign.

How often should a review be refreshed?

At least once a trading year, and sooner if codes or platform rules change. An undated review cannot be checked against current requirements.

What should I compare alongside a review?

Use the radio advertising product comparison in England to match formats and inventory to your brief, then verify data duties and consent before signing.