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Three Keystone Law partners recognised in prestigious Spear’s 500 Legal Indices

08 Jul 2026

2 min read

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Three Keystone Law partners have been recognised by Spear’s in its highly regarded legal indices. Aoife O’Sullivan and Dr Jonathan Hadley Piggin were recognised in the Aviation & Yachts Lawyers Index, while Sharmila Mehta was recognised in the Immigration Index. All three lawyers were recommended for their work and expertise in their respective practice areas.  

The esteemed indices recognise the top private client advisers drawn from peer nominations, client feedback, interviews, and data supplied by firms, as well as information gathered by the Spear’s editorial and research teams. 

Aviation  

Aoife O’Sullivan 

Aoife is an internationally recognised aviation lawyer with expertise across private, corporate, and commercial aviation. She advises a global client base, including ultra-high-net-worth individuals, corporations, aircraft operators, financiers, lessors, manufacturers, and private owners, on all aspects of aircraft acquisition and sale, financing, and regulatory compliance. 

Read Aoife’s Spear’s profile here. 

Immigration 

Sharmila Mehta 

Sharmila is a specialist in UK-inward immigration law and British nationality and has advised prominent international families, Middle Eastern royalty, celebrities, and global companies. She is adept at assisting with the complexities of all manner of entry routes and has worked closely with senior officials at the Home Office on many sensitive cases and policy issues. 

Read Sharmila’s Spear’s profile here. 

Yachts  

Dr Jonathan Hadley Piggin 

Jonathan is a highly experienced marine and superyacht law specialist, with a broad legal practice that focuses on both the domestic and international yachting sector. His client base comprises banks and private clients in the yacht and superyacht industry. In addition, Jonathan advises marine businesses, crew and other leisure marine operators such as yacht management companies and marina owners. 

Read Jonathan’s Spear’s profile here.   

For further information please contact:

Aoife O’Sullivan

Partner

020 3319 3700

aoife.osullivan@keystonelaw.co.uk

Sharmila Mehta

Partner

020 3319 3700

sharmila.mehta@keystonelaw.co.uk

Dr Jonathan Hadley-Piggin

Partner

020 3319 3700

jonathan.hp@keystonelaw.co.uk

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