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Mayer Brown International LLP

Living Wage
Work 020 3130 3000
Fax 020 3130 3001

Will Glassey

Work +44 20 7398 4640
Mayer Brown

Work Department

Insurance and Reinsurance


Will Glassey is a litigator whose practice deals principally with the defence of professional negligence claims. He has a particular emphasis on defending claims against solicitors, barristers, pensions actuaries and property professionals. He also conducts insurance coverage disputes, under both direct and reinsurance contracts. Will works with some of the UK's leading firms and their insurers to conclude sensitive and complex claims, discreetly and economically. Many such claims are concluded in early pre-action stages, some settle at mediation, and some are resolved by trial in Court or arbitration. The subject matter of the solicitors’ claims Will defends is diverse, but he has a particular focus on claims arising from transactions, including corporate, commercial, real estate and finance transactions, and he has extensive experience in claims arising from pensions and tax issues. Will Glassey also advises insurers on policy issues arising in claims against professionals, particularly solicitors, including the aggregation of claims, notification and claims control provisions, and successor practice and run-off issues. Will also continues to represent insurers and reinsurers in reinsurance coverage disputes.


University of Auckland 1992 LLB (Hons)

London: Corporate and commercial

Financial services

Within: Financial services

Notwithstanding the departures at the end of 2017 of Mark Compton to the Bank of New York Mellon and Guy Wilkes to Mishcon de Reya LLP, Mayer Brown International LLP still maintains a 'strong financial services litigation capability', and is well-placed to resource multi-jurisidictional regulatory investigations and follow-on private litigation by virtue of practitioners in key jurisdictions including Hong Kong and the US. Solicitor advocate Alistair Graham is a 'very strong commercial litigator with a wealth of knowledge in the contentious financial services field' gleaned through years of private practice in addition to a previous tenure on secondment as Enforcement Counsel to the FSA. The 'outstanding' William Glassey 'commands respect both from his own clients and opponents' as a result of the 'careful preparation and superb judgement he brings to any case'.

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London: Dispute resolution

Professional discipline

Within: Professional discipline

Mayer Brown International LLP has particular strengths in relation to solicitors and accountants and the disciplinary inquiries upon which it advises are often conducted in parallel with other regulatory investigations and actual or threatened civil litigation. William Glassey heads the department and has a particular emphasis on defending claims against solicitors, barristers, pensions actuaries and property professionals. Tim Shepherd was promoted to counsel in 2018.

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London: Insurance

Professional negligence

Within: Leading individuals

William Glassey - Mayer Brown International LLP

Within: Professional negligence

Mayer Brown International LLP¬†defends sensitive and high-profile professional negligence claims, often with an international element, for clients such as QBE, Kier, Beazley, AIG and Knight Frank. Jim Oulton¬†is defending two BDO partners against allegations of negligence and dishonesty made in relation to the administration and sale of a hotel, and is defending HW Fisher & Company against allegations of negligence and breach of fiduciary duty, among others. Tom Duncan, who regularly handles construction-related professional indemnity claims, continues to advise Costain and its insurers on a number of issues which have arisen at three microbiological treatment plants and four IVC plants in Manchester, which are part of a ¬£4bn waste-to-energy project; he is also advising Costain and its insurers on a case relating to paving at the Port of Felixstowe. The¬†‚Äėunflappable and very commercial‚Äô¬†William Glassey¬†is a ‚Äėrare mix of technical legal knowledge, gravitas and practicality‚Äô; he¬†heads the department with Michael Regan, who is noted for construction and engineering disputes alongside the ‚Äėbrilliant‚Äô Sally Davies. Sean Connolly¬†handles disputes involving a range of accountancy, legal, investment banking, property management and design consultancy professionals, chartered surveyors, and insurance and reinsurance brokers;¬†Jonathan Stone¬†is active in construction and engineering disputes; and¬†Matthew Williams, James Morris, and Hannah Cartwright¬†are key senior associates. Lindsay McQuillian left the firm for an in-house role and Ingrid Hobbs¬†joined Kennedys¬†in 2018.

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