Peter Gallagher

Pete is the Managing Partner of Johnson Law Group’s London office.

Pete has extensive experience of cutting-edge group action litigation. He acted as the Lead Solicitor in the high-profile Dieselgate litigation, leading the team against a number of major car manufacturers. That group of cases currently constitutes the largest group action ever to proceed through the English Courts.

Before beginning his group action litigation practice, Pete acted for a range of major corporate clients in complex domestic and international litigation at both Shearman & Sterling, where he trained, and White & Case. His experience includes acting on contentious regulatory matters as well as civil litigation.  

Before starting his legal career, Pete studied at Cambridge University.

“Pete is extremely switched on and very bright. He is very good at taking decisions, understands litigation and is able to reach sensible and quick decisions” – Chambers and Partners 2025

“Pete has a very sharp mind… nothing escapes him” – Chambers and Partners 2025]

‍