Reviews
When to trust out of home advertising reviews and when to verify instead
How to read out of home advertising reviews without being misled: what changed in UK ad rules, the evidence to demand and a before/after table for buyers.
What to take away
- Out of home advertising reviews have shifted from recommendation to due diligence. Online safety duties now reach some user-to-user and search services, and advertising carried on them can be caught. The ICO has also been issuing decision notices over advertising technology data, so a review that ignores either strand is out of date.
- The Advertising Standards Authority has moved several out of home specific issues into active casework. A provider review needs a named compliance contact and a current CAP Code position, not a line about being "fully compliant".
- Ask for the media owner's site list, illumination specification and traffic or footfall source before you read any star rating. Ratings without those are marketing.
- Use the before/after table below to convert a supplier claim into a question you can put in writing.
- Treat "best provider" lists as a shortlisting tool only. The decision rests on your own brief, your audience geography and your tolerance for planning risk.
Why out of home advertising reviews changed in the UK
The old review format asked whether a billboard looked good. The current format asks what data sits behind the panel, who controls it, and whether the site has planning consent for the format being sold.
Out of home advertising reviews used to be judged on visibility, location and price. Those still matter. What has changed is that a growing share of the inventory is digital, addressable or measured by device-level data, and that pulls the medium into rules written for online advertising.
The Online Safety Act 2023 extended duties to certain user-to-user and search services, and advertising carried on those services can be caught. For buyers, the practical effect is that a provider's data practices are now part of the review, not a footnote.
Separately, the Information Commissioner's Office has been issuing decision notices against organisations over advertising technology and data handling. Those notices are public, and they are the fastest way to check whether a measurement partner in your media plan has a regulatory history worth knowing about.
Planning law is the third strand. Advertisement control sits largely in the Town and Country Planning Act 1990, and the detail is in the Town and Country Planning (Control of Advertisements) (England) Regulations 2007. A site sold as having deemed consent may not have it.
None of this means out of home is riskier than other channels. It means the evidence you need before signing has changed, and a review that predates these shifts is not a review you can rely on.
What should a review of out of home advertising actually check?
Start with the inventory, not the pitch. A supplier should be able to name the sites, the format, the illumination, the size and the contract length for each.
Then check measurement. Ask what the audience number is based on, who produced it and when. If the answer is a footfall count from a mobile network, ask which network and under what lawful basis.
Then check the commercial terms. A rate card is not a price. Ask for the rate you would actually pay at your budget, with production and installation separated.
Finally, check the paper trail. Planning consent or deemed consent for the format, a named compliance contact, and a complaints history you can verify rather than take on trust.
If you are comparing several suppliers at once, our guide to out of home advertising product comparison shows how to line up formats and rates so the numbers are genuinely comparable.
How do you tell a real review from a rewritten rate card?
A real review contains at least one thing the supplier would rather you did not read. That is the simplest test.
Look for named sites. "Premium London locations" is not a site list. "Two 48-sheet panels on the A4 corridor, both illuminated, both with deemed consent" is.
Look for dates. Audience figures, traffic counts and availability change. A review with no date cannot be checked and should be treated as undated marketing.
Look for an admission of limits. Every provider has formats it does not sell well, regions it cannot cover, or minimum spends that rule out small campaigns. A review that finds no weaknesses has not looked.
Look for the source of any audience claim. If the number is footfall, say so. If it is modelled, say so. If it is a device-based estimate, say so and say who modelled it.
This is also where regulatory sources earn their place. The ASA news and updates on advertising regulation page is worth checking before you accept a supplier's assurance that a creative route is fine. Rulings on out of home and adjacent formats are published there, and they move the line.
What evidence should you demand before signing?
Ask for four documents: the site schedule, the measurement methodology, the planning position and the data protection position.
The site schedule should list every location, format and contract end date. A site that comes off contract in three months cannot support a twelve-month campaign. If the supplier cannot produce the schedule, the review stops there.
Our out of home advertising review methodology explains how we score those documents, including how we weight measurement quality against coverage and how we treat missing paperwork.
The measurement methodology should name the data source, the sample or panel, the modelling approach and the refresh frequency. A single number with no method is not evidence.
The data protection position matters most for digital and addressable inventory. If audience measurement or targeting involves personal data, the controller, the lawful basis and the retention period should all be documented. Where a supplier's partner has been the subject of enforcement, the ICO's decision notices are the place to confirm it rather than relying on the supplier's summary.
The planning position should state whether each site relies on deemed consent or express consent, and for digital formats whether the display meets the brightness and dwell conditions that apply. This is where a cheap site can become an expensive one.
When does a comparison table mislead you?
Comparison tables mislead when the columns are chosen by the supplier being compared, or when the rows are not like for like.
A 48-sheet on a busy arterial road is not comparable to a digital screen in a shopping centre, even if both are priced per two-week period. The audience, the dwell time and the creative constraints differ.
Tables also mislead when they mix rate card with net rate. One supplier's published price and another's negotiated price will make the second look better for reasons that have nothing to do with value.
Geography is the third trap. A national average hides the fact that most of the value sits in a handful of sites. Ask for the site-level split, not the average.
If you are building a shortlist across several regions, our out of home advertising best providers in England piece shows how we group providers by coverage pattern so that the comparison stays fair.
Before and after: what a weak review looks like next to a strong one
| Element | Before: weak review | After: stronger review |
|---|---|---|
| Sites | "Premium UK locations" | Named sites, format, size, illumination and contract end date |
| Audience | One headline number | Number plus method, source, date and refresh cycle |
| Planning | "Fully compliant" | Deemed or express consent stated per site. Digital conditions checked. |
| Data | Not mentioned | Controller, lawful basis, retention. Named processors. |
| Regulation | No references | Links to ASA rulings and ICO decision notices where relevant |
| Price | Rate card figure | Rate at your budget. Production and installation separated. |
| Limits | None stated | Formats not sold, regions not covered, minimum spend |
| Contact | Sales inbox | Named compliance and account contacts |
Read the table left to right. The left column describes what most supplier-supplied reviews contain. The right column is what you should be able to assemble yourself before a decision.
How should agencies and brands split the work?
Brands usually own the risk appetite and the creative. Agencies usually own the plan, the negotiation and the paperwork.
That split only works if the agency has the data rights position in writing. Media agencies buying digital out of home often sit between a media owner, a measurement vendor and a client's own data. The LinkedIn resources for agencies are a useful reference for how platform-side teams structure that kind of agency relationship, even though the channel is different.
For brands running their own buying, the practical rule is to keep one person accountable for the evidence pack. If nobody owns it, nobody checks it.
For agencies pitching out of home to clients, our out of home advertising agency reviews in England piece covers what clients now ask to see during a pitch, which is a useful checklist before you present a plan.
Where does digital out of home fit in a review?
Digital out of home is where the review gets hardest, because the inventory behaves like a screen network and the measurement behaves like online media.
It helps to know what you are comparing against. A Display Network definition from Google Ads describes the online equivalent: a collection of sites and apps where ads are placed programmatically. Digital out of home increasingly borrows that language, which is why buyers now ask about targeting, frequency and verification in a channel that used to be sold by poster site.
The difference is that a digital panel is a physical object in a specific place. Its value comes from that place, not from audience data layered on top. If a supplier sells the data and not the place, ask what the place is worth on its own. Ask too whether each screen is sold individually or as part of a loop, since that changes both frequency and price.
For 2027 planning, this matters because digital sites are being refreshed and recontracted now. Our out of home advertising: England market guide for 2027 looks at how those contract cycles are likely to affect availability and pricing.
What does a defensible scoring method look like?
A defensible method has fixed weights, published before the providers are scored, and a rule for missing evidence.
We use four categories: inventory quality, measurement credibility, compliance and commercial terms. Each is scored against written criteria, and a missing document scores zero rather than being ignored.
That last point is the one buyers most often get wrong. If a supplier will not provide the planning position, the correct score is not "unknown" but "fail", because you cannot buy what you cannot verify.
Scores are also time-stamped. A provider that scored well last year may have lost a key site or changed measurement vendor. A review without a date is a review you cannot audit.
Common questions
Are out of home advertising reviews trustworthy?
Some are, if they name sites, date their figures and state their method. Treat any review that names no sites and cites no source as a sales document. The test is whether you could reproduce the conclusion from the evidence given.
Do I need planning consent checks for a digital billboard?
Yes. Advertisement control under the Town and Country Planning Act 1990 and the 2007 Regulations for England sets out when consent is needed and what conditions apply. A supplier should be able to confirm the position for each site in writing.
How often should a provider review be refreshed?
At least annually, and immediately after any change of media owner, measurement vendor, contract term or format. Digital sites are recontracted on multi-year cycles, so availability can shift within a single year.
What if a supplier refuses to share measurement methodology?
Treat it as a failed check rather than a gap to fill later. If the audience number cannot be explained, the price cannot be justified, and the comparison against other providers becomes meaningless.
In this guide
- An out of home advertising review methodology without the vendor spinHow we score out of home advertising suppliers: what gets assessed, what does not, and how vendor claims are separated from independent evidence.
- Why out of home advertising best providers need a shortlist methodHow to shortlist out of home advertising best providers in England, using inclusion criteria, a before and after comparison table and due diligence checks.
- Eight criteria for an out of home advertising product comparisonEight criteria for scoring an out of home advertising product comparison, from audience evidence to copy compliance, with weights, sources and questions to ask.
- Out of home advertising agency reviews explained for England buyersHow to read out of home advertising agency reviews in England: what a review can assess, what it cannot, and how to tell vendor claims from evidence.
- An out of home advertising selection checklist that survives scrutinyAn out of home advertising selection checklist for UK buyers: compliance, campaign fit, audience evidence and a worked budget example before sign-off.
