Irwin Mitchell

The firm: Irwin Mitchell are legal experts that care. As one of the largest full-service law firms in the UK, they’ve supported over one million clients and counting. Whether it’s personal or business, they understand that everyone’s situation is different. They offer 24/7 client care, ensuring their clients are at the centre of what they do.

Founded in 1912, they’ve grown from a small building in Sheffield, to offices in 20 locations across the UK and a global reach that extends to over 200 countries. With over 3000 staff and 180 services, their vast experience and knowledge is complemented by their dedicated approach to client care. Whether it’s settling a case before trial, or succeeding at the Supreme Court, it’s all about the results they achieve when it matters, and the relationships they develop along the way.

The firm recently invested in Scottish law firm Wright, Johnston & Mackenzie to increase their market share North of the border. They followed this up with the acquisition of Silk Family Law, demonstrating their ambitions in the Northeast of England.

Their commitment to being responsible goes further than the law and they have donated over £3m to charitable causes since 1997. In 2023, their colleagues completed over 6,000 hours of volunteering. They are the only law firm to be named in the Very Big category of the Sunday Times Best Places to Work 2025 and was awarded a Gold Award in the Defence Employer Recognition Scheme.

They’re recognised in The Times’ list of the best law firms in England and Wales and The Lawyer magazine named them as ‘a litigation powerhouse’. They were recently recognised as the number one Superbrand in the legal sector and are the Official Legal Partner to England Rugby, British Rowing and UK Athletics.

Market: As the leading personal injury and medical negligence practice in the UK, Irwin Mitchell helps thousands of families whose lives have been turned upside down. Supported by a national Public Law team and the UK’s leading Court of Protection practice, they offer help and reassurance during the hardest times.

Irwin Mitchell’s private client offering specialises in residential property, family, Wills, tax, as well as trusts and estate disputes. They protect high and ultra-high net worth individuals, including business owners and entrepreneurs, corporate executives, investors, and multi-generational families.

This is supported by a full suite of business services for corporate clients and institutions such as litigation, corporate, commercial, international property and employment law. They offer tailored guidance to businesses when it comes to navigating environmental, social and governance, and are part of First Law International - a global network of more than 80 law firms.

Group chief executive: Craig Marshall
Chief client officer: Louise Lumley
Chief finance officer: Richard Allen

Number of partners: 256
Other fee-earners: 1,843

UK Offices: Aske, Birmingham, Brighton, Bristol, Cardiff, Cambridge, Chichester, Edinburgh, Glasgow, Leeds, London, Liverpool, Gatwick, Manchester, Middlesbrough, Newbury, Newcastle, Reading, Sheffield and Southampton