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Top Advertising Companies in the UK

188 of 497 advertising companies ranked on evidence in the Q4 2026 edition.

We list 23 advertising companies in the UK. The order comes from what each firm publishes and what has been verified about it, never from payment — at the top right now: Hydrant, CRISP and KAT Marketing.

Before you shortlist, check

Campaigns they ran for businesses your size, with results you can verify
How media is bought, and whether they take commission or rebates on it
Who owns the creative, and for how long you can use it
The reporting you will get, and from whose systems

TrustList ranking

Q4 2026 edition

188 of 497 advertising companies ranked on evidence held on 9 October 2026: client reviews, vetting, awards and facts each business states on its own website, which we read and date. Nobody pays to be placed.

Positions are fixed for the quarter; the next edition is due in January 2027.

How this is ranked About this edition

Flagship ranking · Q4 2026 edition

This page ranks advertising companies in the United Kingdom, a mix of full-service marketing agencies, creative studios and specialists in one medium or sector. TrustList lists 474, and 101 earned a rank number in the Q4 2026 edition. Among the ranked, 6 hold a professional accreditation, 6 are Google partners, 2 cite ISO 9001, one cites ISO 27001 and one Cyber Essentials. Eighty-eight state a founding date, 44 of them in the 2000s. London is the most common base (16), then Manchester (5) and Glasgow (4).

The order reflects the evidence TrustList held on 5 October 2026: client reviews, vetting, awards and facts each agency states on its own website, which we read and dated. Nobody pays to be placed. Agencies with nothing checkable are listed, not ranked, and positions stay fixed until the January 2027 edition. An agency can move up by adding client reviews or verified facts to its free profile.

By TrustList Editorial

All advertising companies 188 ranked SMEs 187 ranked

The SME ranking on this page lists 473 small and medium-sized agencies, and 101 of them earned a rank number. One business known to be large is left out, and the SME order does not reward age. See the SME ranking

Filter by fitbudget, engagement, size and more

The top three

1
Affinity Agency
Best for: SMEs, utilities and local authorities
Clients range from start-ups and regional SMEs to household-name brands, public utilities, local authorities and social housing organisations.
- Norwich, with offices in Birmingham and London
- Founded 1986
- Google partner
- Team of 40+
View profile
2
Don’t Panic
Best for: Charities and purpose-driven brands
Works with charities, causes and purpose-driven brands, drawing on deep knowledge of the charity sector.
- London, United Kingdom
- Founded 2003
- professional accreditation
View profile
3
Contentcoms
Best for: Energy, technology and sustainability firms
Specialises in energy, technology and sustainable businesses, working only with firms that want to cut carbon or improve industrial efficiency.
- United Kingdom
- Founded 2009
- professional accreditation
View profile

Affinity Agency
Best for: SMEs, utilities and local authorities
Branding · eCommerce · Production · Also in Norwich and London
Affinity Agency is a full-service marketing and web agency headquartered in Norwich, with further offices in Birmingham and London.
Write a review
Why #1: Based in Norwich, with offices in Birmingham and London · Founded 1986 · Google partner · Team of 40+, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Don’t Panic
Best for: Charities and purpose-driven brands
Don’t Panic is a strategy and creative agency in London whose campaigns aim to reframe social issues and prompt people to act.
Write a review
Why #2: Based in London, United Kingdom · Founded 2003 · professional accreditation, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Contentcoms
Best for: Energy, technology and sustainability firms
Consumer Products & Services · Arts, Entertainment & Music · Energy & Natural Resources
Contentcoms, which trades as Content Coms, is a strategic marketing and communications agency specialising in energy, technology and sustainable businesses.
Write a review
Why #3: Based in United Kingdom · Founded 2009 · professional accreditation, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Espan Digital Marketing
Advertising & Marketing · Business Services
Espan Digital Marketing is a consultancy that focuses on Google Ads and search engine optimisation.
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Why #4: Based in East Sussex, England · In business 15+ years · Google partner, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
DOOH
Best for: Digital out-of-home advertising
Creative · Production
DOOH is a creative studio devoted to one medium: digital out-of-home advertising, meaning campaigns that play on outdoor and public screens.
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Why #5: Based in London · Founded 2014 · Cyber Essentials, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
64 Digital
Supply Chain, Logistics, and Transport · Consumer Products & Services · Arts, Entertainment & Music
64 Digital is a UK agency that has spent more than ten years on web design, mobile apps and digital marketing.
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Why #6: Based in UK · In business 10+ years · Client numbers stated on its own website, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Creative Marketing Services
Best for: Firms outsourcing their marketing
Creative Marketing Services is a full-service marketing agency in Leeds that has been building brands since 1982.
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Why #7: Based in Leeds, with a presence in London · Founded 1982 · Team of 20+, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
DMS
DMS is a direct marketing and fundraising agency in Cheltenham, with a team of around 50 people whose background is in direct response advertising.
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Why #8: Based in Cheltenham, United Kingdom · In business 40+ years · Team of 50+, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Cygnus Ltd.
Social Media Marketing · Web Design · Digital Marketing
Cygnus Ltd. is an independent creative and digital agency based near Milton Keynes.
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Why #9: Based in Milton Keynes, England · In business 26+ years · Team of 43+, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Big Partnership
Supply Chain, Logistics, and Transport · Consumer Products & Services · Hospitality & Leisure
Big Partnership is an independent integrated communications agency in the UK.
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Why #10: Based in United Kingdom · In business 25+ years · Team of 90+, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Waste
Web Design · Web Development · UI/UX Design
Waste is an independent digital creative agency founded in 2006.
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Why #11: Based in London and Los Angeles · Founded 2006 · Team of 70+, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
Feref
Best for: Entertainment brands
Arts, Entertainment & Music · Social Media Marketing · Search Engine Optimization
Feref is a creative agency founded in 1968 and based in Soho, London, working on campaigns for entertainment brands. It is now part of the Delta Group.
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Why #12: Based in Soho, London · Founded 1968, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Gilroy Corporate Communications
Arts, Entertainment & Music · Information Technology · Creative · Also in London
Gilroy Corporate Communications, which trades as Gilroy, is a B2B marketing agency that helps large brands win new accounts, grow existing ones and hold on to customers for longer.
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Why #13: Based in London (Waterloo office) · In business 50+ years, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Adfield Group
Social Media Marketing · Web Design · Digital Marketing
Family-owned marketing, communications and events agency in the West Midlands offering telemarketing and digital services
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Why #14: Based in Telford, West Midlands, UK · Founded 1978 · Family-owned, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
Ad-lib Design Partnership Ltd
Consumer Products & Services · Arts, Entertainment & Music · Advertising & Marketing · Also in Worcester
Ad-lib Design Partnership Ltd is a graphic and web design studio in Worcester, England, close to the M5.
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Why #15: Based in Worcester, England · Founded 1981, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Lavery Rowe Advertising
Advertising · Also in London
Lavery Rowe Advertising is a UK agency that specialises in direct response advertising, meaning campaigns designed to win new customers and generate leads.
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Why #16 (shared): Based in London and Birmingham, UK · In business 40+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Dawson Design
Best for: Technical B2B companies
Information Technology · Creative · Medical · Also in Europe
Dawson Design is a graphic design agency in Manchester that concentrates on technical business-to-business clients.
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Why #16 (shared): Based in Manchester, UK · Founded 1986, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Design Workshop
Consumer Products & Services · Real Estate · Creative
Design Workshop is an integrated design and marketing agency in Hull, trading as Design Workshop (Humberside) Ltd.
Write a review
Why #16 (shared): Based in Hull, England · In business 40+ years, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Havas Lynx Group
Best for: Pharmaceutical and healthcare brands
Social Media Marketing · Web Design · Digital Marketing
Havas Lynx Group is a healthcare communications agency and part of the Havas Health global network.
Write a review
Why #16 (shared): Address in United Kingdom · Founded 1986, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Dalziel and Pow
Consumer Products & Services · Advertising & Marketing · Non Profit
Dalziel and Pow, often shortened to D&P, is an independent strategy and design studio working from London with clients around the world.
Write a review
Why #16 (shared): Based in London, UK · In business 40+ years, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
James Harris Associates
Business Services · Non Profit · Real Estate
James Harris Associates, trading as Harris and Harris Creative, is a marketing and PR agency that concentrates on the construction sector.
Write a review
Why #16 (shared): Based in north of England · In business 40+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
fatBuzz
Arts, Entertainment & Music · Advertising & Marketing · Information Technology
fatBuzz is a full-service marketing agency founded in 1986 and based in Kinning Park, Glasgow.
Write a review
Why #16 (shared): Based in Glasgow, UK · Founded 1986, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Farrows
Farrows is a creative marketing and digital agency in Norwich, England.
Write a review
Why #16 (shared): Based in Norwich, England · In business 40+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Impact Design & Marketing
Consumer Products & Services · Arts, Entertainment & Music · Advertising & Marketing
Impact Design & Marketing is a creative agency in the West Country of England. It was established in 1987 and describes itself as one of the region's most experienced agencies.
Write a review
Why #24 (shared): Based in West Country, England · Founded 1987, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.

The top ten at a glance

As each business states it on its own website, read by TrustList for this edition.

#	Business	Based in	Since	Accreditations	Best for
1	Affinity Agency	Norwich, with offices in Birmingham and London	1986	Google partner	SMEs, utilities and local authorities
2	Don’t Panic	London, United Kingdom	2003	professional accreditation	Charities and purpose-driven brands
3	Contentcoms	United Kingdom	2009	professional accreditation	Energy, technology and sustainability firms
4	Espan Digital Marketing	East Sussex, England	15+ yrs	Google partner
5	DOOH	London	2014	Cyber Essentials	Digital out-of-home advertising
6	64 Digital	UK	10+ yrs	None stated
7	Creative Marketing Services	Leeds, with a presence in London	1982	None stated	Firms outsourcing their marketing
8	DMS	Cheltenham, United Kingdom	40+ yrs	None stated
9	Cygnus Ltd.	Milton Keynes, England	26+ yrs	None stated
10	Big Partnership	United Kingdom	25+ yrs	None stated

How to choose advertising companies

1. Ask who owns the ad accounts
Check that advertising accounts and data sit in your name, so you can move agency without losing history. Ask for read access to every platform used.
2. Understand how media is bought
Find out whether the agency marks up media or charges a flat fee, and ask for spend reports that show what was bought and where.
3. Check the rules it works to
UK advertising is governed by the Advertising Standards Authority and the CAP Code. Ask how the agency checks claims, and how it labels influencer and sponsored content.
4. Settle rights in the creative
Confirm in writing who owns the finished work, how long music, images and talent are licensed for, and what it costs to reuse them.
5. See the team behind the pitch
Ask who will work on your account day to day, how often you will meet, and whether any work is outsourced to freelancers.
6. Agree measures and notice terms
Agree which results will be reported, how often, and the notice period. Be wary of long lock-in contracts without a review point.

For vendors

Want to see your company here?

The order is earned on evidence: client reviews, vetting, awards and the facts a business states on its own website, which we read and date. Nobody can pay to move up. Add reviews or verified facts to your free profile to move up at the next edition; there are two ways to stand out now, and each one says what it is.

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How is this ranking worked out?

The order comes from what each firm publishes and what has been verified about it, and never from payment:

Profile completeness: the details a buyer needs to judge a firm — what it does, who it serves, how it prices, who it has worked for
Earned trust: verification, awards and the other checks a firm has actually passed
Client reviews, where they exist: the rating is smoothed, so one five-star review cannot outrank a firm with a hundred good ones, and volume counts with diminishing returns

Client reviews are still rare across this catalogue, so on most lists today the order is set by the first two. A firm near the top is the best-documented and best-verified one we hold, which is not the same claim as the best one to hire. Use the list to build a shortlist, then check the firms yourself.

Sponsored listings are labelled and shown apart from this list. How rankings work

Only firms whose profile names the UK are counted here, so a firm that lists a town but no country is not yet included.

Where else can I look?

The same list elsewhere: India (92) · Canada (41) · Australia (28).

Every category in the UK: the UK country page.

Top B2B companies in the UK38 categories ranked, 2,075 companies

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