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Pinsent Masons LLP is routinely instructed by leading independents and supermajors on high-value M&A, disposals, and cross-border transactions across Europe, Africa, and the Americas. Team head Rosalie Chadwick epitomises the group’s oil and gas M&A strength and led on the landmark £754m business combination between Ithaca Energy and Eni’s UK upstream assets. Shirley Allen, who has over 25 years of private practice and in-house experience, is recognised for her regulatory insight and adept handling of complex commercial contracts. Bruce McLeod is frequently active on multi-jurisdictional M&A and joint ventures, while Rachel Warner has developed a strong track record in domestic and UK-wide mergers and disposals. Neil Hehir, Heather Hutcheon and Ailie Isdale also come recommended. In May 2025, Chris Sawyer joined the team.
Legal 500 Editorial commentary
Testimonials
Collated independently by Legal 500 research team.
‘Deep skill set across a diverse team. Really good partners with extensive knowledge in deals. Ability to seamlessly work internationally with other jurisdictions from Aberdeen is also a key strength.’
‘Shirley Allen: very client friendly and super clear to engage with. Incredible delivery and understanding of key drivers for the client.'
Key clients
- Ithaca Energy plc
- TotalEnergies
Work highlights
Advised Ithaca Energy plc on its £754m business combination with Eni S.p.A.’s UK upstream oil and gas business.