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Portrait of Penelope Warne

Penelope Warne

The Senior Partner
Chairman of the UK LLP Board and Head of Energy & Climate Change

CMS Cameron McKenna Nabarro Olswang LLP
Cannon Place
78 Cannon Street
United Kingdom
Languages English, French

Penelope Warne is The Senior Partner and Chairman of the UK Board. She is also Head of Energy.

Penelope, an oil and gas specialist, joined the firm in 1993 to set up the Aberdeen office and has a strong growth track record. In 25 years, she has transformed CMS’ practice in Scotland from one person in Aberdeen to the market leading practice in Scotland following the combination with Dundas & Wilson in 2014. As the Energy practice group leader, she opened offices in Aberdeen, Edinburgh, Brazil, Mexico and Dubai. Her practice spans the globe advising clients in the oil and gas industry in the North Sea, the US, Norway, Brazil, EMEA and Russia.

Penelope is at the cutting edge of oil industry issues, she is active in thought leadership and trains oil industry lawyers in her role as an Honorary Fellow and Trustee of the Centre for Energy, Petroleum and Mineral Law and Policy at Dundee University. She is also a member of the Foundation Board at IMD, the highly acclaimed international business school based in Lausanne, Switzerland. She is also a member of the Board of the Law Society.

Penelope is ranked as a Leading Energy Expert in both Chambers and Legal 500. She has received many awards for her energy work and has been recognised in The Lawyer's Hot 100 twice. She was also awarded “The Senior Management Partner of the Year” at the British Legal Awards 2017. Penelope was one of only 20 ranked in the law category of The Sunday Times/Debretts “Britain’s 500 Most Influential”. The UK Legal 500 Awards have recently awarded her for Outstanding Achievement where her role was recognised for leading the firm and her commitment to diversity in the City.

Penelope works globally with governments, energy industry specialists and academics and is a member of the Oxford University Vice Chancellor's Circle.

Penelope is a great supporter of Diversity & Inclusion and is proud to lead the fundraising in the firm.

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  • Bristol University.
  • Dually qualified in English and Scots law.
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13 April 2021
CMS an­nounces 52 new part­ners in largest-ever glob­al pro­mo­tions
In­ter­na­tion­al law firm CMS is pleased to an­nounce the pro­mo­tion of 52 new part­ners glob­ally in 2021, span­ning 22 cit­ies across Europe, Lat­in Amer­ica and Africa. The UK ac­counts for 44% of glob­al pro­mo­tions...
09 March 2021
ESG Ex­change
Wel­come to ‘ESG Ex­change’ - con­ver­sa­tions about the real world im­plic­a­tions of ESG to help man­age busi­ness risk and identi­fy op­por­tun­it­ies. ESG (en­vir­on­ment­al, so­cial and gov­ernance) is­sues are in­creas­ingly...
16 December 2020
CMS UK at­tains CDP’s A- score for cli­mate ac­tion and sus­tain­ab­il­ity pro­gramme
CMS UK is pleased to an­nounce that it has been awar­ded a score of A- by CDP in re­cog­ni­tion of its con­tinu­ous ef­forts to tackle cli­mate change is­sues as part of its Cli­mate Ac­tion and Sus­tain­ab­il­ity pro­gramme. The...
05 August 2020
Cli­mate Change and ESG
From an eth­ic­al, repu­ta­tion­al, com­mer­cial and leg­al stand­point, your ap­proach to cli­mate ac­tion and sus­tain­ab­il­ity has nev­er been more im­port­ant. In a world shift­ing rap­idly to­wards a more sus­tain­able...
05 August 2020
Cli­mate Change & ESG - Why CMS?
Se­cur­ing a sus­tain­able fu­ture The firm’s in­ter­na­tion­al scope, sec­tor­al fo­cus and cli­ent base al­lows us to de­liv­er a unique com­bin­a­tion of leg­al and com­mer­cial in­sight on the com­plex is­sues arising...
24 January 2020
Penelope Warne se­cures second term as The Seni­or Part­ner
Glob­al law firm CMS is pleased to an­nounce the re-elec­tion of Penelope Warne as The Seni­or Part­ner of CMS UK LLP, fol­low­ing a vote by the firm’s part­ner­ship. This will be Penelope’s second term, ef­fect­ive...
24 April 2019
CMS is a Times Top 50 Em­ploy­er for Wo­men 2019
In­ter­na­tion­al law firm CMS is de­lighted to be re­cog­nised as a Times Top 50 Em­ploy­er for Wo­men for the fourth con­sec­ut­ive year.The Times Top 50 Em­ploy­ers for Wo­men is the UK’s most highly pro­filed and...
30 November 2018
CMS takes home coveted ‘Law Firm of the Year’ award at Brit­ish Leg­al Awards
CMS was named Law Firm of the Year at the pres­ti­gi­ous 2018 Brit­ish Leg­al Awards, held on 29 Novem­ber in Lon­don. The firm saw off strong com­pet­i­tion from a line-up of firms in­clud­ing Clif­ford Chance, DLA...
07 October 2018
IBA An­nu­al Con­fer­ence 2018
Sev­er­al of our part­ners will be at the IBA An­nu­al Meet­ing in Rome, Italy, rep­res­ent­ing a range of jur­is­dic­tions, prac­tice areas and sec­tor spe­cial­isms. To ar­range a meet­ing dur­ing the IBA, please con­tact...
29 January 2018
Penelope Warne and Vic­tor­ia Gaskell named in The Law­yer­'s Hot 100 for 2018
CMS Seni­or Part­ner Penelope Warne and Co-Head of Me­dia Vic­tor­ia Gaskell have been re­cog­nised in the Hot 100 2018 re­port, pub­lished in The Law­yer magazine. The Law­yer’s Hot 100 gath­ers to­geth­er the standout...
1 May 2017
CMS, Nabarro and Olswang com­plete largest ever mer­ger in UK leg­al sec­tor
CMS UK, Nabarro and Olswang today an­nounce the com­ple­tion of their trans­form­a­tion­al mer­ger, cre­at­ing a new Lon­don power­house and the 6th largest law firm in the UK by rev­en­ue and 6th largest glob­ally...
02 February 2017
Ir­an’s new pet­ro­leum con­tract
This Janu­ary marks the first an­niversary of the “Im­ple­ment­a­tion Day”: the day on which nuc­le­ar-re­lated sanc­tions against Ir­an were lif­ted un­der the Joint Com­pre­hens­ive Plan of Ac­tion (“JC­POA”)...