• Solicitor, qualified in England & Wales
• Non,practising barrister, qualified in England & Wales

• Advising KKR on the regulatory aspects of numerous transactions including its EUR 600 million acquisition of a majority stake in European payment services firm heidelpay; and its $3.3 billion take private of Spanish telecoms company MasMovil alongside Cinven and Providence.
• Advising PGIM Financial Limited on the implementation of the UK's Investment Firms Prudential Regime (IFPR) and the new MiFIDPRU Remuneration Code.
• Assisting an investment manager implement the Senior Managers & Certification Regime (SMCR) by working in partnership with the client on multiple work streams including liaising with key teams on the detail of the rules and requirements of the regulator; and addressing a range of regulatory, governance, systems and controls queries.
• Providing ongoing regulatory support to Citadel on a broad range of matters including on the post-Brexit legislative and regulatory environment.
• Advising Bain Capital on its year-long effort to acquire LV=, the UK's second largest insurance mutual. We provided extensive and wide ranging regulatory, compliance and risk management advice to Bain Capital.
• Advising BMO Financial Group on the sale of its EMEA asset management business to Ameriprise Financial, Inc.
• Advising an investment manager in relation to various IFPR related matters and in particular in relation to the application of various K-Factors.   
• Advising a bank on the transfer of its global markets operation into the UK, which involved assisting on regulatory applications and the preparation of client documentation.
• Regulatory advice on the branch authorisation of a large US bank.
• Assisting a UK bank with its regulatory capital issues.
• A review exercise for the purpose of advising a bank following whistleblowing allegations made in relation to the Bank's compliance with its regulatory requirements.
• Advising on a number of bank, broker and asset manager projects including two globally systemic banks.
• Advising numerous banks on conduct and prudential related issues.

Band 1, Financial services regulation, Chambers and Partners, 2023
"He's unflappable and always a reassuring, calm and pragmatic presence. Jonathan provides first-class advice and support"

Hall of Fame, Financial Services: contentious  The Legal 500 UK 2025
“Jonathan has an impressive understanding of the legal and regulatory framework. He is able to advise in a calm and reassuring manner across a number of complex and sensitive matters.”  “He has a wealth of international experience. His awareness, pragmatism, and extensive experience make him a pleasure to work with.”

Band 1, Financial Services – Non-contentious Regulatory, Commodities: Derivatives & Energy Trading, Chambers and Partners UK, 2023
"'high-profile figure in the financial regulatory arena"
"frequently advises household names in banking on cross-border compliance programmes".

• The FCA's new Consumer Duty: Is your firm ready?
• Regulation Around the World

• A Practitioner's Guide to MiFID, Commodity derivatives chapter: Co-author
• Financial Regulation Service (Butterworths) e-commerce volume: Co-author
• Brexit and Financial Regulation (Oxford University Press): Contributor and co-editor. 

Jonathan is a leading commentator on Brexit and has been quoted and extensively referenced in a number of publications including Financial News, Reuters, FT Financial Adviser and City AM. Jonathan gave evidence to the House of Lords EU financial affairs sub-committee inquiry on the impact of Brexit on financial services. He also moderated a panel discussion at City & Financial's Beyond Brexit Summit, titled 'Towards a new model for UK financial services regulation'.  
 

Jonathan has an increasing quasi-public sector profile. He has been instructed by the likes of IRSG to chair the branches Future Regulation Group and UK Finance on the Bounce-Back bond HM Government initiative. 

Jonathan regularly participates in public events, where he acted as chair for plenary discussions at City & Financial's 'The UK's Post-Transition Regulatory Regime for Financial Services' in November 2020 and the Financial Services Summit in May 2022 .

Jonathan is a frequent speaker at financial services conferences.