
Energy & Natural Resources: Oil & Gas
UK Guide 2026 : UK-wide
Rankings

Ranked Individuals
Ranked Individuals
About
Provided by CMS
Please visit the CMS website for more details about the practice and our work:
Law firm specialised in Energy & Climate Change - CMS in the UK
Chambers Review
Provided by Chambers
Work Highlights
Provided by Chambers
CMS assisted the Romanian government with the development and implementation of a scheme to procure more than EUR10 billion of renewable energy by 2030.
CMS advised Equinor on a corporate joint venture with Shell to form a new independent producer in the North Sea.
Strengths
Provided by Chambers
CMS are highly responsive and extremely quick without compromising the quality of their advice.
Energy & Natural Resources: Oil & Gas respondentUKThe CMS team are always on time and on budget. They keep costs down, which we really appreciate.
Energy & Natural Resources: Oil & Gas respondentUKCMS have exceptional service and responsiveness throughout the transaction process and afterwards.
Energy & Natural Resources: Oil & Gas respondentUKThe CMS team have a very strong understanding of our business. We rely on them for their commercial advice.
Energy & Natural Resources: Oil & Gas respondentUKCMS have an excellent, partner-led approach with strong senior solicitor support, as well as excellent negotiation skills.
Energy & Natural Resources: Oil & Gas respondentUK
Notable Practitioners
Provided by Chambers
Band 2 
Band 2 
Phillip Ashley
Phillip Ashley is regularly instructed by high-profile energy clients for representation in disputes pertaining to pricing structure, design defects, supply agreements and delay costs, among other issues. He has extensive experience of ICC and LCIA arbitrations, as well as court proceedings, concerning conventional power assets.
Phillip Ashley is very thorough and clever.
Energy & Natural Resources: Oil & Gas respondentUKPhillip has a statesmanlike presence and brings a new level of gravitas to the interaction that everyone recognises and values.
Energy & Natural Resources: Oil & Gas respondentUKPhillip Ashley is the go-to disputes person for North Sea oil and gas. No one knows it better, and he is very user-friendly.
Energy & Natural Resources: Oil & Gas respondentUK
Band 3 
Band 3 
Munir Hassan
Munir Hassan has noteworthy expertise in renewable energy transactions, with particular experience handling mandates relating to offshore wind and solar projects. He frequently assists clients with acquisitions, disposals and project financing matters. He is also head of the firm's global energy and climate change practice.
Band 3 
Band 3 
Valerie Allan
Valerie Allan is a partner in the firm's oil and gas team, based in Aberdeen. She specialises in energy disputes, including contract termination and claims for delay and disruption.
Band 4 
Band 4 
Charles Currier
Charles Currier is noted for his expert representation of energy companies, infrastructure funds and other investors. He frequently assists with the acquisition and disposal of wind and solar assets, including North Sea wind farms.
Charles Currier is fantastic all the way through.
Energy & Natural Resources: Oil & Gas respondentUK
Up and Coming 
Up and Coming 
Louise Dalton
Louise Dalton is widely appreciated for her work in the power and renewables market. Dalton adeptly handles transactions relating to solar and battery storage assets, in addition to attendant commercial matters such as storage offtake agreements. She is also experienced in corporate power purchasing and related regulatory matters.
Louise is really good and has a great battery storage practice.
Energy & Natural Resources: Oil & Gas respondentUKLouise Dalton is an expert on renewable projects. Her technical expertise is unmatched and she is a joy to work with.
Energy & Natural Resources: Oil & Gas respondentUKLouise is very good on the regulation side.
Energy & Natural Resources: Oil & Gas respondentUK
Ranked Individuals at CMS (5)
Members
Provided by CMS

Munir Hassan
View profile of Munir Hassan
Charles Currier
View profile of Charles Currier
Valerie Allan
View profile of Valerie Allan
Phillip Ashley
View profile of Phillip Ashley
Louise Dalton
View profile of Louise Dalton
CMS has rankings in the following guides
Band 1 Europe 2026
Practice area: Energy & Natural Resources
Location: Portugal
View department profile for Europe 2026Band 1 Europe 2026
Practice area: Energy & Natural Resources
Location: Poland
View department profile for Europe 2026Band 3 Europe 2026
Practice area: Energy & Natural Resources
Location: Spain
View department profile for Europe 2026Band 4 Europe 2026
Practice area: Energy & Natural Resources
Location: Netherlands
View department profile for Europe 2026Band 3 Global 2026
Practice area: Energy & Natural Resources
Location: Spain
View department profile for Global 2026
What success is built on
Chambers is the leading data and intelligence partner for the legal sector.