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Portrait of Judith Aldersey - Williams

Judith Aldersey - Williams

Partner

CMS Cameron McKenna Nabarro Olswang LLP
6 Queens Road
Aberdeen
AB15 4ZT
United Kingdom
Languages English, French
Energy & Climate Change

Judith Aldersey-Williams is a partner in the CMS Energy & Climate Change Team, with over 25 years of experience in upstream oil and gas contracts and regulation. Based out of the Aberdeen office, she advises energy industry clients in the UK and internationally on their joint venture agreements, transportation agreements, gas sales agreements and procurement contracts and has worked on projects from Angola to Trinidad (she’s still hoping for a project in Zambia).  She also advises on regulatory issues and on competition/antitrust matters in the oil and gas industry. 

Her career highpoints have been advising Oil & Gas UK in its negotiations with the UK Government over the introduction of ground-breaking contracts to guarantee tax relief for decommissioning and advising the Subsea Well Response Project, a group of nine multinational oil companies, on contracts for the development and funding of innovative equipment which is now available to allow operators around the world better to respond to well control incidents like Macondo. She regularly supports Oil & Gas UK on industry initiatives.

With more than 450 energy and climate change lawyers, including over 100 partners, the CMS Energy and Climate Change practice is one of the largest of its kind in the world. Led from its centres of excellence such as London and Aberdeen, the practice works across 75 offices globally. Building on 40 years of experience advising on power, oil & gas and renewables through to energy disputes, emerging areas and Energy Transition, CMS is uniquely placed to ensure clients receive advice best suited to their commercial needs and to our collective future.

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"Always good and commercial legal advice and really good support."

Legal 500, 2020

"extremely helpful and pragmatic," adding that she is "very approachable and responsive."

Chambers, 2019

"a very smart lawyer"

Chambers 2018

“Judith Aldersey-Williams is viewed by multiple interviewees as "at the forefront of complex industry legal issues," and receives particular praise for her handling of decommissioning matters. Recent highlights include assisting with exploration and production contracts, including farm-out arrangements, and mandates for service companies.”

Chambers, 2016

Judith Aldersey-Williams is viewed by multiple interviewees as "at the forefront of complex industry legal issues," and receives particular praise for her handling of decommissioning matters. Recent highlights include assisting with exploration and production contracts, including farm-out arrangements, and mandates for service companies.

Chambers UK 2015

Chambers UK 2014 says Judith “is a "strong name in the industry" and stands out for her work with Oil & Gas UK on decommissioning tax relief. Sources marvel at her intellectual prowess: "Judith is incredibly bright. For really complex problems she is the best, and has done an amazing job working on industry standards."

Chambers UK 2014

Outstanding

Legal 500, 2013

Relevant experience

  • Oil & Gas UK in negotiations with HM Treasury and HMRC for introduction of decommissioning relief deeds to provide certainty over decommissioning tax relief and their implications for decommissioning security.
  • Shell as operator of Subsea Well Response Project, a joint venture of nine multinational oil companies, on agreements with Oil Spill Response Limited for the development of equipment to respond to well control incidents worldwide.
  • TAQA representing a consortium of operators ("the Operational Gas Group") on a suite of contracts for purchase of fuel gas in Northern North Sea.
  • Oil & Gas UK on drafting of industry standard JOA and DSA.
  • BP on restructuring of contracts for the Foinaven Field.
  • Kellas Midstream on suite of agreements for the development of the Tolmount Field.
  • Major on decommissioning contracting strategy for significant portfolio of assets.
  • Independent on integrated services agreement.
  • Major oil companies on the drafting of decommissioning security agreements.
  • Multinational on a total facilities contract.
  • Major independent on competition issues arising out of joint marketing or selling of hydrocarbons.
  • Multinational on application of decommissioning legislation to UK wells and on issues relating to derogations from OSPAR.
  • Services company on development of standard service agreements.
  • Independent on sole risk issues under JOA.
  • Independent on risk issues arising out of contractual indemnity arrangements.
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Memberships & Roles

  • Trustee of the Energy, Mineral and Natural Resources Law and Policy Education Trust.
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Publications

  • 2021 - Thomson Reuters Practical Law Energy Global Guide Oil and Gas UK 2021.
  • 2018 - Chapters on competition law and Decommissioning Security in Oil and Gas Law – Current Practice and Emerging Trends, Gordon and Paterson, 3rd Edition, Dundee University Press.
  • 2016 - Default clauses in joint operating agreements: recent guidance from the English courts, International Energy Law Review.
  • 2016 - Chapter on Decommissioning Security in Decommissioning, ed Hammerson, Global Law and Business, 2nd Edition.
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Lectures list

  • Law Society of Scotland Oil and Gas Conference 2021 – Rights to oil and gas – Offshore and onshore UK Licensing and Liability.
  • UK Oil and Gas Law Course (CEPMLP and CMS Cameron McKenna), Banchory – November 2019 – Competition Law and Collaboration, Decommissioning and Decommissioning Security.
  • Oil & Gas UK Legal Conference 2018 – Decommissioning regulation update.
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Education

  • 1989 - Admitted as a Solicitor in England and Wales
  • 1987 - Law Society Finals, College of Law
  • 1986 - Kennedy Scholarship to Harvard Law School, LLM
  • 1985 - BA in Law, 1st class, Cambridge University, Cambridge
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Competition

Judith Aldersey-Williams has over 25 years’ experience advising on competition and regulatory matters in the UK and now brings that experience to bear for her clients in the energy sector.

Her current main focus is the interaction of competition law and collaboration in the context of the current cost pressures faced by the industry and the new system of UK oil and gas regulation which requires the industry to collaborate to maximise economic recovery across the basin. 

With more than 450 energy and climate change lawyers, including over 100 partners, the CMS Energy and Climate Change practice is one of the largest of its kind in the world. Led from its centres of excellence such as London and Aberdeen, the practice works across 75 offices globally. Building on 40 years of experience advising on power, oil & gas and renewables through to energy disputes, emerging areas and Energy Transition, CMS is uniquely placed to ensure clients receive advice best suited to their commercial needs and to our collective future.

more less

"Always good and commercial legal advice and really good support."

Legal 500, 2020

"extremely helpful and pragmatic," adding that she is "very approachable and responsive."

Chambers, 2019

"a very smart lawyer"

Chambers 2018

Relevant experience

  • Oil & Gas UK on potential competition law implications of data sharing to optimise resource allocation on the UKCS.
  • Independent oil company on competition issues arising out of joint marketing or selling of NGLs.
  • Service company on competition issues arising out of club for drilling operations.
  • Multinational operator on competition issues in joint purchasing of logistics services in remote location.
  • Multinational on competition law implications of sharing of data in context of an area plan.
  • Infrastructure owner on competition issues arising out of dedication clause.
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Publications

  • 2021 - Thomson Reuters Practical Law Energy Global Guide Oil and Gas UK 2021.
  • 2018 - Chapters on competition law and Decommissioning Security in Oil and Gas Law – Current Practice and Emerging Trends, Gordon and Paterson, 3rd Edition, Dundee University Press.
  • 2016 - Default clauses in joint operating agreements: recent guidance from the English courts, International Energy Law Review.
  • 2016 - Chapter on Decommissioning Security in Decommissioning, ed Hammerson, Global Law and Business, 2nd Edition.
more less

Lectures list

  • Law Society of Scotland Oil and Gas Conference 2021 – Rights to oil and gas – Offshore and onshore UK Licensing and Liability.
  • UK Oil and Gas Law Course (CEPMLP and CMS Cameron McKenna), Banchory – November 2019 – Competition Law and Collaboration, Decommissioning and Decommissioning Security.
  • Oil & Gas UK Legal Conference 2018 – Decommissioning regulation update.
more less

Education

  • 1989 - Admitted as a Solicitor in England and Wales
  • 1987 - College of Law, Law Society Finals
  • 1986 - Kennedy Scholarship to Harvard Law School, LLM
  • 1985 - Cambridge University, BA in Law, 1st class
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8 April 2021
The Cor­por­ate In­solv­ency and Gov­ernance Act 2020 and the Oil & Gas In­dustry
The Cor­por­ate In­solv­ency and Gov­ernance Act 2020 (“CIGA”) came in­to force on 26 June 2020 after an ac­cel­er­ated par­lia­ment­ary pro­cess, its main ob­ject­ive be­ing to as­sist busi­nesses to con­tin­ue trad­ing...
18 March 2021
How to achieve ‘net zero’ – the OGA’s new Stew­ard­ship Ex­pect­a­tion
The OGA’s Stew­ard­ship Ex­pect­a­tions form a key ele­ment of its As­set Stew­ard­ship Strategy to sup­port the in­dustry’s im­ple­ment­a­tion of the steps re­quired to achieve MER UK. The in­tro­duc­tion of the new...
11 March 2021
The OGA ESG Taskforce re­com­mends en­hanced dis­clos­ure and re­port­ing of cli­mate-re­lated...
The Oil and Gas Au­thor­ity’s En­vir­on­ment­al, So­cial and Gov­ernance Taskforce (“ESG Taskforce”) has out­lined a num­ber of ex­pect­a­tions which op­er­at­ors and li­censees should meet in re­la­tion to dis­clos­ure...
05 March 2021
Oil and Gas Au­thor­ity Up­date Feb­ru­ary 2021
The OGA has now been the oil & gas in­dustry’s reg­u­lat­or for over 5 years. It con­tin­ues to de­vel­op both the scope and fo­cus of its form­al and in­form­al en­gage­ment with the in­dustry to en­sure that all...
21 January 2021
Life after Brexit – Im­plic­a­tions for the up­stream oil and gas sec­tor
Now that the dec­or­a­tions are packed away and the Christ­mas cake crumbs swept up, we are turn­ing our at­ten­tion to the out­come of the last minute agree­ment of the Trade and Co-op­er­a­tion Agree­ment (TCA)...
06 January 2021
Power­ing our Net Zero Fu­ture – the En­ergy White Pa­per 2020
On 14 Decem­ber 2020, the UK gov­ern­ment pub­lished its long-awaited En­ergy White Pa­per set­ting out its vis­ion for a trans­ition to clean en­ergy by 2050. In the in­tro­duc­tion to the white pa­per, Sec­ret­ary...
21 December 2020
Oil & Gas: OGA’s role in M&A trans­ac­tions – let­ters of com­fort and ju­di­cial...
In R (on the ap­plic­a­tion of Thornton) v OGA [2020] EWHC 2615 (Ad­min)  the Eng­lish courts con­sidered, for the first time, wheth­er a ‘let­ter of com­fort’ giv­en by the Oil and Gas Au­thor­ity (“OGA”)...
17 December 2020
Re­vised OGA Strategy sub­mit­ted to be laid be­fore Par­lia­ment
The Oil and Gas Au­thor­ity (“the OGA”) has sub­mit­ted its re­vised Strategy for lay­ing in the UK Par­lia­ment, fol­low­ing its first four yearly re­view and as­so­ci­ated con­sulta­tion earli­er this year. The...
09 December 2020
Oil & Gas / Ship­ping – Black Holes and Rev­el­a­tions
In Dr Jones Yeovil Ltd v The Step­ping Stone Group Ltd [2020] EWHC 2308 (TCC), the Tech­no­logy and Con­struc­tion Court has raised the  spectre of oil and gas com­pan­ies not be­ing able to re­cov­er full dam­ages...
02 November 2020
Green­peace’s pe­ti­tion for ju­di­cial re­view of con­sent to an off­shore field...
The Out­er House has re­fused per­mis­sion to Green­peace (the “pe­ti­tion­er”) to bring a pe­ti­tion for ju­di­cial re­view against the Sec­ret­ary of State for Busi­ness En­ergy and In­dus­tri­al Strategy (“BEIS”)...
07 September 2020
32nd Off­shore Li­cens­ing Round sees 113 Li­cences Awar­ded by OGA
On 3rd Septem­ber, the Oil and Gas au­thor­ity (OGA) an­nounced its of­fer for the award of 113 li­cences over 259 blocks or part-blocks to 65 com­pan­ies. Li­cences were awar­ded in the OGA’s 32nd Off­shore Li­cens­ing...
28 August 2020
En­ergy Trans­ition on the UKCS - two crit­ic­al re­ports pub­lished
In­tro­duc­tion Au­gust saw the pub­lic­a­tion of two doc­u­ments which will have a sig­ni­fic­ant bear­ing on de­vel­op­ments in the oil and gas in­dustry in the next dec­ade, and which are closely re­lated. The De­part­ment...