Our team
Our team - Maxine Frerk

Maxine has wide regulatory experience including 15 years in Ofgem in senior roles and previously at BT. Most recently she was a member of Ofgem's executive board responsible for all aspects of regulation of the distribution networks, including setting the RIIO ED1 price control and launching Ofgem’s work on flexibility and the future of gas.

Earlier in her Ofgem career she led on consumer policy and was a member of the government’s Fuel Poverty Advisory Group. She also has significant experience on smart metering, including two years in DECC as Deputy Programme Director where she led, among other things, on development of the smart meter Data Access and Privacy Framework.

Since leaving Ofgem at the end of 2016 she has been working as an independent consultant for a mix of regulated company and consumer / community group clients. She also chairs SGN’s Customer Engagement Panel. 


Maxine Frerk
Sharon Darcy
Sharon DarcyDirector
Sharon is a champion of consumer concerns in energy and water and has worked with Sustainability First since 2013. She served on the Council of Which? until April 2019, prior to which she was a long-standing board member of Consumer Futures.
Clare Dudeney
Clare DudeneyAssociate
Clare currently works with Sustainability First as an associate on a number of current projects, including leading the Sustainable Futures Programme. She is also a fine artist and curator.
Maxine Frerk
Maxine FrerkAssociate
Maxine Frerk has wide regulatory experience including 15 years in Ofgem in senior roles.
Dr Martin Hurst
Dr Martin HurstAssociate
Dr Martin Hurst was a senior civil servant on environmental issues for 20 years, including as Water Director in government and Environment Advisor in Number 10, and is by background a professional economist.
Zoe McLeod
Zoe McLeodAssociate
Zoe McLeod is a consumer policy and regulatory expert with a particular focus on energy, water, innovation and consumer vulnerability issues.
Judith Ward
Judith WardAssociate
Judith Ward has worked with Sustainability First as an associate since 2005. She was director of Sustainability First for five years. She is an energy policy professional with long-standing practical experience of both the utility and consumer worlds.
Alice Cross
Alice CrossResearch Officer
Alice is Sustainability First’s Research Officer, responsible for carrying out research on projects and Sustainability First initiatives, as well as communicating Sustainability First’s messages.
Janine Duffy
Janine DuffyCommunications and Engagement Officer
Janine is Sustainability First’s Communications and Engagement officer, responsible for developing and implementing the organisation’s communications strategy.
Sonya Peres
Sonya PeresEducational Outreach Officer
Sonya is Sustainability First’s part-time Educational Outreach Officer for the Sustainable Futures Programme. She is working on delivering workshops on sustainability for primary and secondary school youth.