Reviews
Part of How to review media buying agencies for brief fit, not reputation
Three media agency evidence cards, separating verified facts from agency claims
Media buying agencies agency reviews in England: read three evidence cards that separate verified public facts, agency claims and unanswered buyer questions.
These media buying agencies agency reviews are evidence cards, not ratings. Three agencies receive the same treatment: English presence, public description, what that record supports and what a buyer still needs to prove. None can be declared better from a website alone.
What to take away
- A buyer should collect the same evidence from each invited agency and record every unanswered point.
- Only proposal evidence, references and negotiated terms can resolve the open questions raised.
Why these three records were reviewed
The desk research was completed on 5 September 2026 for an advertiser operating in England. Eligibility required a live agency-owned page showing an English office or UK operation and a recognisable media remit. We chose three examples with different public records to show how evidence gaps should remain visible.
We excluded unverifiable directory entries, award claims, client results, anonymous comments and pages without current agency ownership. The selection is illustrative rather than exhaustive. UK network descriptions are not England-only performance evidence.
No agency was contacted, hired or observed at work. We did not inspect a plan, trading record, platform account, contract, invoice or result. No entry paid, supplied access or has an affiliate or commercial relationship with this site. The editorial lead at Media Buyers Guide is accountable for these reviews and will correct factual errors on request.
Equal-field review cards
OMD UK
- Public recordthe agency-owned UK page identifies OMD UK, its leadership and a London office.
- Supported judgementan England-based buyer can verify a current contact route and named senior roles before making an enquiry.
- Evidence limitthe reviewed page does not prove how a proposed team would plan, buy, measure or charge for the buyer's work.
- Verdictthe record supports checking who to contact, not judging how the account would be run or priced.
- Next questionrequest the exact service scope, delivery locations, account ownership and remuneration model in writing.
dentsu UK
- Public recorddentsu's UK page describes a group of agencies, including several media brands, with differing remits across planning, performance and related services.
- Supported judgementthe record can help a buyer identify which named agency inside the group should answer a particular brief.
- Evidence limitgroup breadth does not establish which legal entity contracts, which people deliver, or whether capabilities are available for this appointment.
- Verdictthe record supports picking the right brand to brief, not confirming the contracting entity or the delivery team.
- Next questionrequire one accountable proposal that maps agency brands, staff, systems, fees and subcontracting to the work.
the7stars
- Public recordits first-party site presents a London contact and describes media planning, buying, analytics and technology within its own operation.
- Supported judgementthe page provides a basis for asking how its stated independent model affects governance and buying routes.
- Evidence limitself-described independence and capability are not proof of price, transparency or campaign outcomes.
- Verdictthe record supports questions about independence and buying routes, not claims about price, transparency or results.
- Next questionask for contract wording on inventory capacity, rebates, data access, audit rights and conflicts.
Source pages, all accessed 5 September 2026:
- OMD UK: the agency-owned UK page carrying its leadership and London office details.
- dentsu UK: the agency-owned UK page describing the group and its media brands.
- the7stars: its own site pages covering contact details and its planning, buying, analytics and technology services.
What would change these reviews
Evidence a buyer can inspect would change these cards: the contracting entity, signed terms, live account access and measured results.
Evidence to collect from each agency
- Contracting entity and proposed people
- Channel responsibility and account permissions
- Measurement definitions and complete fees
- Media ownership positions and conflicts
- Transition terms, fixed deadline, equal clarification
The IPA and ISBA guide to finding an agency describes fair and transparent UK review practice, including brief and evaluation choices. Its publication date is 2019, so current legal and platform points need fresh checking. That source adds agreed review conventions that the three cards cannot evidence.
The Companies House search guidance explains how to inspect UK company records, but a filing record is not a capability or credit assessment. It adds a way to identify the contracting entity behind a trading name, which the cards leave open.
Only proposal evidence, references appropriate to the brief and negotiated terms can resolve the open questions above. Any later review should show who examined that material, when they did so and why their conclusion applies to this buyer rather than to all advertisers.
Before you act
- Set one brief, one deadline and one evidence request for every agency you invite.
- Ask in writing which legal entity would hold the contract and which named people would run the account.
- Compare the pitch team with the team named in the contract and ask what would change between the two.
- Ask how the agency earns, including rebates or group deals that could affect the advice you receive.
- Agree the measures you will be judged on, plus who owns the data and who may audit it, before signing.
- Take references from comparable advertisers and check them against the proposal.
Common questions
What did the review actually examine?
The review examined three sets of public pages, listed with their access date above. It tested whether each agency-owned page shows an English office or UK operation, what the agency claims there, and what that record can support for an advertiser in England.
Why can these agencies not be ranked against each other?
The three entries rest on different kinds of public record, so no common measure exists between them. The selection is illustrative rather than exhaustive, and UK network descriptions are not England-only performance evidence.
What should a buyer do next with these three records?
Collect the same evidence from each invited agency: contracting entity, proposed people, channel responsibility, account permissions, measurement definitions, complete fees, media ownership positions, conflicts and transition terms. Set a fixed deadline and allow equivalent clarification.
