Company lists · Data refreshed August 2026
Top 25 Advertising law firms based in London, United Kingdom
RevenueBase identified 66 advertising law firms headquartered in London, United Kingdom as of August 2026 and tracks 867 professional contacts across them, including 552 with verified work emails and 53 with mobile numbers. London is the largest hub.
This list covers advertising law firms headquartered in London, United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed August 30, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest advertising law firms based in London, United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 225 contacts → | ||||
Indirect evidence “J A Kemp is a firm packed with patent and trade mark attorneys at the top of their game, renowned for their technical excellence, human engagement and trusted advice.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 2 | 97 contacts → | ||||
Partial evidence “Lee & Thompson is one of the UK’s leading law firms for the media, technology and creative industries.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 3 | 81 contacts → | ||||
Partial evidence “The go-to media, entertainment & commercial law experts, providing the full range of legal services you would expect from a leading and award-winning law firm that has been…” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 4 | 61 contacts → | ||||
Indirect evidence “All our practitioners focus on particular technologies or IP disciplines to provide you with a winning combination of technical knowledge, business acumen and a sound appreciation…” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 5 | 44 contacts → | ||||
Indirect evidence “A specialist firm of patent attorneys, trade mark attorneys, design attorneys & IP litigators, Beck Greener has offices in London and close to the EUIPO in Alicante.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 6 | 39 contacts → | ||||
Indirect evidence “We're commercial business lawyers, primarily in the fashion, sport, food and beverage and automotive sectors, helping our brands with their home operations and international…” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 7 | 34 contacts → | ||||
Partial evidence “We act for clients in all areas of IP Law, particularly patent, trade mark, design right and copyright law.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 8 | 15 contacts → | ||||
Partial evidence “We are London based solicitors specialising in intellectual property, technology, commercial, corporate and employment law.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 9 | 15 contacts → | ||||
Partial evidence “We are a boutique law firm in London that provide expert legal advice in commercial, IP, litigation and corporate law matters.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 10 | 15 contacts → | ||||
Indirect evidence “From 1 December 2024, all of the Partners and People of AA Thornton IP LLP joined Venner Shipley LLP to carry on business together under the name Venner Shipley.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 11 | 14 contacts → | ||||
Partial evidence “We are Sipara, intellectual property (IP) law specialists, helping our clients to protect and maximise the potential of their IP rights.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 12 | 13 contacts → | ||||
Indirect evidence “Since launching in 2014, Patent Boutique LLP has acquired an enviable track record for delivering results for its growing and impressive client roster.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 13 | 13 contacts → | ||||
Indirect evidence “We are British and European Patent and Trade Mark Attorneys.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 14 | 9 contacts → | ||||
Partial evidence “Intellectual Property and Media Lawyers Hansel Henson is a specialist firm of solicitors with a sole emphasis on soft Intellectual Property and Media law.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 15 | 8 contacts → | ||||
Strong evidence “Founded by Nigel Abbas, ABBAS Media Law is a specialist law firm working principally in the television, film, advertising and publishing industries.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 16 | 8 contacts → | ||||
Partial evidence “Cohen Davis Solicitors is a boutique law firm that specialises in internet law matters.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 17 | 7 contacts → | ||||
Indirect evidence “Your legal partner for pivotal moments.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 18 | 7 contacts → | ||||
Indirect evidence “We take key pride in effective representation and offering experienced advice in selected areas of practice.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 19 | 5 contacts → | ||||
Partial evidence “Cassadys is a law firm which is fast gaining prominence as a niche provider of legal services across various sectors.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 20 | 5 contacts → | ||||
Partial evidence “PAIL® Solicitors is a London-based law firm authorised and regulated by the Solicitors Regulation Authority.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 21 | 4 contacts → | ||||
Indirect evidence “We are passionate about our work, and interested in yours.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 22 | 4 contacts → | ||||
Partial evidence “Founded in 2009, RafterMarsh US and RafterMarsh UK is a pioneering trans-Atlantic boutique law firm providing legal and business development services to the audio, music…” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 23 | 4 contacts → | ||||
Indirect evidence “Providing legal advice to those in the creative and financial services sectors” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 24 | 3 contacts → | ||||
Indirect evidence “We provide carefully designed, clear and cost-effective legal advice to support the growth of our community of clients.” Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
| 25 | 3 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Aug 30, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: advertising law firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names advertising law firms.
- Partial evidence
- Its own public description names part of advertising law firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name advertising law firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 66 advertising law firms based in London, United Kingdom
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Advertising law firms based in London, United Kingdom at a glance
As of Aug 30, 2026Companies by employee count
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among advertising law firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in London, United Kingdom whose own description of what they do matches “advertising law firms”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names advertising law firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among advertising law firms, and records with no verified work email. Companies headquartered outside London are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 552 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on August 30, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Advertising law firms by metro in the United Kingdom
- Advertising law firms in London66
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names advertising law firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many advertising law firms are there based in London, United Kingdom?
RevenueBase identified 66 advertising law firms headquartered in London, United Kingdom as of August 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
J A Kemp, headquartered in London, tops this list with the largest team on record.
Which city has the most advertising law firms?
London leads with 66 headquartered companies, followed by Bristol (6) and Liverpool (5).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 552 verified decision-maker contacts tracked across these 66 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on August 30, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.