- Profile
Profile
Position
Jason is a go-to silk in high-stakes commercial litigation and arbitration, consistently described by the directories as “an absolute star”, “a natural advocate” and “respected commercial litigator”. Before taking silk, after only 13 years, he was hailed as “one of the best juniors at the London Bar”.
He has an extensive commercial practice, which includes aviation, banking & finance, civil fraud, commodities, construction, energy, insurance, reinsurance, professional negligence, sanctions, shareholder & company disputes, shipping & admiralty, and superyacht & supercar disputes.
Recent work includes acting for the aviation hull all risks insurers in a 48-day Commercial Court trial, in their successful defence of multi-billion dollar claims regarding the loss of aircraft following the invasion of Ukraine: [2025] EWHC 1430 (Comm).
Career
Called 2012 (Middle Temple).
Silk 2025
Queen Mother Scholar of the Middle Temple.
Education
B.A. Law (Double First Class), University of Cambridge.
BCL (Distinction), University of Oxford.
Content supplied by 7 King’s Bench Walk
Testimonials
Collated independently by Legal 500 research team.
- 'Greg Leyden stands out for his impressive leadership.'
- 'The clerks are client-focused.'
- 'The clerks handle barristers well and look after clients very well. Engaged and engaging.'
- 'A favoured set for high value and complex litigation.'
- 'The go to set for insurance coverage.'
- '7KBW offers a wealth of experience.'
- 'Excellent service. The clerks respond promptly and are very approachable.'

