MOSL is funded by our members. We are independent and impartial, operating a level playing field in the new water retail market. The MOSL Board has been appointed to ensure the values and standards of the company are upheld, overseeing its performance in line with members’ expectations. Furthermore, it encourages MOSL to achieve its objectives within the obligations set out by the market and new market codes of practice. Read the Board briefing note to find out more about the role of MOSL's Board.

Anne Heal

Anne Heal

Chair of Market Operator Services Limited (MOSL)

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Anne has a wealth of experience in the utilities sector, alongside a twenty-year track record of strategic delivery at Board level, both in the UK and globally. Anne spent a number of years in marketing communications, before joining BT where she held a number of senior roles, including Director of Strategic Planning and Director of Corporate Business Development.

Since actively pursuing a portfolio career, Anne currently serves as a board member, panel member and trustee for a wide variety of organisations, such as the Office of Rail and Road (ORR), ELEXON and the National Council of Voluntary Organisations.

Dr Simon Orebi Gann

Dr Simon Orebi Gann

Independent Non-Executive Director

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Dr Simon Orebi Gann has more than 30 years of executive management experience in Information Technology and strategic management and has nearly 20 years’ experience serving on private and public boards as a non-executive director.

In addition to his membership of the MOSL Board, he currently serves on the boards of the Low Carbon Contract Company Ltd, the Electricity Settlements Company Ltd and Aspen Technology Inc. Dr Orebi Gann is also an independent member of the Government’s Major Projects Advisory Board.

Sarah McMath

Sarah McMath

CEO of Market Operator Services Limited (MOSL)

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Sarah has vast experience of the water industry, having worked in a variety of roles across a number of technical, asset management and operational teams at Thames Water.

Sarah was previously Managing Director of Water at Thames, before becoming Managing Director of Strategic Planning and Investment in April 2018. Sarah started her career at Thames in the innovation team, working as a research scientist, where she completed her doctorate in Environmental Engineering. Here, she headed up the Water Quality team, before taking on a number of operational and technical roles and from 2008, led the Asset Management teams.

In 2011, Sarah moved to the Strategy and Regulation team, leading the preparation and submission of Thames Water’s business plans for PR14 and held the responsibility of Programme Director for Competition 2017 ahead of the opening of the water retail market on 1 April. She is an advocate for innovation in the utilities sector and has been the driving force behind many large investment projects.

Sarah joined MOSL as Chief Executive in June 2019. In this role, she continues to focus on driving innovation and collaboration to ensure the open market delivers on its commitments to customers and tackles some of the biggest challenges facing the wider water industry.

Sarah is a trustee of the Don McMath Foundation, a charity which provides free schooling to children in the Gambia and also sits on the Board of Trustees for the National Oceanography Centre.

Margaret Beels OBE

Margaret Beels OBE

Independent Non-Executive Director

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Margaret has had a varied executive and non-executive career, and was heavily involved in the privatisation of the electricity industry. She was Chief Executive of the Electricity Pool, which enabled wholesale trading in the new market. She led British Gas’ efforts to separate its gas supply and network and is currently Chair of the Gangmaster’s Licensing Authority.

Don Maher

Don Maher

Non-Executive Director: Wholesaler Members

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Don, Head of Market Wholesale Market Services at Anglian Water, has vast experience of the non-household water market, having contributed to the Open Water Programme prior to market opening and headed up Anglian Water’s approach to the Inset/NAV market. Don has also been involved in a number of the company's senior level boards including the Market Reform Governance Board and the Wholesale Board, as well as an active member of the Market Performance Committee since market opening.

Josh Gill

Josh Gill

Non-Executive Director: Unassociated Retailers

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Josh Gill is Managing Director and founder of water retailer, Everflow, which was founded in 2015. Josh has over five years of experience working in water retail markets, in both Scotland and England. He specialises in the development of software, with a strong track record of delivering to time and budget, including the software underpinning Everflow's success in the market, which was designed and delivered in-house. Everflow was also the first retailer to partner with a customer to help them gain a self-supply licence.

Lucy Darch

Lucy Darch

Non-Executive Director: Associated Retailer Members

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Lucy Darch joins the MOSL Board with over 25 years experience in the utilities sector. As an experienced business leader, she has held a number of senior leadership roles across gas, electricity and water at Enron Direct, uSwitch and British Gas Business and has vast knowledge of new entrant start-ups, business development and digital delivery across utilities.

Lucy was previously Managing Director of NWG Business, before being appointed CEO of Wave Utilities in September 2017.

Hunada Nouss OBE

Hunada Nouss OBE

Independent Non Executive Director

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Hunada Nouss joined the MOSL Board on 1 November 2020 as an Independent Non-Executive Director.

Hunada is an accomplished business leader with a strong record of delivering change and achieving high performance in complex organisations. Her career spans private sector businesses, notably Diageo Plc. and Burger King Corporation, the public sector, including leading roles in Whitehall in the Department for Work and Pensions and the former Department for Communities and Local Government, as well as not-for-profit organisations.

She is currently a non-executive director in a range of organisations, supporting strategic change and organisational performance. Hunada sits on the Board of the Met Office, the UK’s national weather service, and chairs its Audit and Risk Assurance Committee. She is a Board member, and Audit Chair, for the Education and Skills Funding Agency, the body responsible for mobilising £60bn of funding for education and training. She also has a seat on a number of audit committees including that of the Royal Society and the Sponsor Board of Restoration and Renewal project of the Palace of Westminster. She has recently completed a nine-year commitment as Council member and Audit Chair of City, University of London.

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