Thomson Reuters names eight Keystone Law partners in its Stand-out Lawyers Guide 2026
Andrea James, Andrew Darwin & Anna McKibbin
Jamie provides specialist legal advice to the sports, events and entertainment industries. Jamie’s expertise extends across motorsport, rugby, cricket, golf and football, as well as Olympic sports including athletics, rowing, and alpine and freestyle skiing. He also advises on legal issues connected with a wide range of live events, as well as providing transactional and litigation advice to talent agencies, high-profile actors, television and sports personalities. Jamie’s wider expertise includes advising on product safety and liability, education matters, agricultural and rural issues particularly farm partnerships, forestry and woodland and BNG and Nutrient Mitigation. He also provides specialist advice in relation to the sale, purchase and restoration of art and antiques and also classic, vintage and historic cars.
Jamie is a CEDR accredited mediator and has wide ranging experience of High Court and County Court proceedings, as well as national and international arbitration, mediation and national and international sports tribunals. He is also a past Chair of Snowsport England and an RFU Registered Agent.
Jamie advises on sales, acquisitions, agreements, due diligence, provenance, title, regulatory compliance, insurance, intellectual property, and disputes involving artworks, antiquities, and classic cars, including restoration, authenticity, ownership, and auction matters.
Experience
Jamie advises on commercial, contractual, and regulatory matters in cricket, including player-agent disputes, team and coaching agreements, ECB appeals, and the application of Kolpak Regulations for professional players and clubs.
Experience
Jamie advises on high-value commercial disputes, regulatory and environmental claims, enforcement of judgments and arbitration awards, and protective proceedings.
Experience
Jamie advises on contracts, rights, licensing, sponsorship, production, touring, distribution, brand management, intellectual property, and disputes across music, film, TV, online media, publishing, and live events, including regulatory, privacy, and compliance matters.
Experience
Jamie advises on event production, licensing, sponsorship, venue, performer, merchandising, ticketing, broadcasting, rights clearance, and intellectual property, including anti-counterfeiting, ambush marketing prevention, and media exploitation across live, broadcast, and digital platforms.
Experience
Jamie advises on driver, rider, and team contracts, sponsorships, joint ventures, and management agreements, as well as disputes, regulatory matters, and commercial transactions across F1, GT, Le Mans, motorcycle, and junior motorsport.
Experience
Jamie advises on VIP hospitality, partnership, ambassadorial, sponsorship, and operational agreements, as well as tender, production, and selection appeal matters, in relation to the Olympic Games, including London 2012, Rio 2016, and Tokyo 2020.
Experience
Jamie advises on player, coach, and shareholder contracts, contract terminations, club negotiations, and event and hospitality agreements, including Rugby World Cup tenders, British Lions productions, and professional rugby player transitions.
Experience
Jamie advises on the drafting, negotiation, and finalisation of agreements for events, football matches, concerts, brand activations, and broadcasts across Africa, including engagements with FIFA, national associations, celebrity talent, and broadcasters.
Experience
Jamie supports landowners, estates and venues in relation to the staging and management of a wide range of sporting, entertainment, and cultural events. His wider expertise includes rural conservation matters.
Experience
Jamie advises parents, guardians and independent preparatory and senior schools on the sensitive handling of bullying and disciplinary matters, breach of contract claims, educational negligence and related damages claims.
Experience
Jamie advises leading chefs, brands, suppliers, venues and events organisations on a wide range of commercial issues linked to the development, promotion, and protection of their brands and business operations.
Experience
Jamie is an expert adviser to the sports industry. He has particular expertise within the football industry, having been instructed in relation to sponsorship rights, contractual disputes, and major events.
Experience
Jamie has extensive experience of advising and supporting leading brands, stakeholders, governing bodies, venue owners, creative and production companies and across the sports, leisure and events industries on brand profiling and development, global partnerships and the staging of VIP events.
Experience
Jamie offers a full-service in-house legal function for SMEs, including advising on corporate governance, employment and consultancy agreements, commercial contracts, brand management, sponsorship, insurance, joint ventures and corporate acquisitions.
Experience
Jamie provides advice to the cruise and ferry industry on commercial agreements and passenger and crew illness, injury, and compensation claims. He also handles travel and tourism-related litigation for tour operators, agents and insurers.
Experience
Jamie is an expert adviser to the sports industry. His expertise extends across motorsport, cricket, rugby, football, as well as a wide range of Olympic sports including volleyball, hockey, tennis, athletics, rowing, and winter sports.
Experience
Please note: The experience list above may include examples of work completed prior to joining Keystone Law.
Recognised by The Legal 500 for Agriculture & Estates 2026
Recognised by The Legal 500 for Sport 2022–2026
Recognised by The Legal 500 for Media & Entertainment 2022
“Jamie Horner has worked with us for several years and built up a knowledge of our industry which enables him to take our ideas and needs and create practical solutions. This makes him unique and vital to our business. He is often quick to respond and I trust I can leave him with a request and he will come back to me quickly with a well thought through proposal.”
The Legal 500 2026
“Jamie Horner is outstanding in the non-contentious and contentious sports field – in particular motorsports and motor racing. Charming and extremely able, he is an excellent lawyer.”
The Legal 500 2024
“Jamie Horner is an outstanding practitioner in the sports sector, with enviable experience in many fields, including motor racing.”
The Legal 500 2023
“The Sport's practice includes the excellent Jamie Horner.”
The Legal 500 2023
“Jamie Horner is a standout expert in the motor racing field. An excellent advocate as well as technical lawyer, he is greatly respected (and liked) by clients and peers alike.”
The Legal 500 2022
Jamie qualified as a solicitor in 1999. Prior to joining Keystone Law in 2020, he worked at the following firms: