Office for Nuclear Regulation

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ONR Board

The ONR Board's role is to provide leadership, set strategy, agree the overarching policy framework within which ONR operates as a regulator, agree and monitor resources and performance and ensure good governance. The Board is chaired by Mark McAllister under the terms of ONR's framework document.

Members are:


Mark McAllister

Mark McAllister

ONR Chair

Mark McAllister was appointed as Chair of ONR in April 2019. 

He is an engineer by profession and has worked in the international oil industry since 1979.

Mark has held Chief Executive positions at several companies including Acorn Oil  & Gas, Fairfield Energy and most recently Shandong Twin Marine Limited where he continues as CEO.  

He served as Chairman of Oil Spill Response and Prevention Advisory Group (OSPRAG) which formulated the joint response of the North Sea oil industry, trade unions and government to the Macondo blowout in the Gulf of Mexico.

He has helped pioneer a new marine heavy-lift technology aimed at ensuring the safe and efficient removal of large offshore oil and gas platforms.

In 2009, he was awarded an Honorary Doctor of Technology from Robert Gordon’s University in recognition of services to the oil industry.

Mark is currently a non-executive director for the Oasis Charitable Trust, a multi-national charity employing over 4,000 staff.

Oona Muirhead CBE

Oona Muirhead

Oona was appointed as a member of the Board on 1 October 2014 and is the Chair of ONR's Security Committee. She is also a non-Executive Director for MSS Global, a small ethical auditing company, and provides strategic business advice to Policy Connect, a cross-party think-tank and – from time to time - other companies. She began her career in the Ministry of Defence, was Director of Communications during the Kosovo campaign of 1999 and then Director General responsible for Organisational Change across the MoD.

After senior executive roles in DEFRA and the Local Government Organisation she became Chief Executive of the South East England Development Agency in 2011. She also chaired the Nations & Regions Group (South East) for the 2012 London Olympic Games Organising Committee, and is a Trustee of the Royal Navy & Royal Marines Charity.

Bronwyn Hill CBE

Bronwyn Hill

Bronwyn Hill CBE joined the ONR Board on 18 January 2016 for a four year term.

Bronwyn became a non-executive following a career in transport and environmental issues. A former Permanent Secretary at the Department for Environment, Food and Rural Affairs and Board member at the Department for Transport, Bronwyn has experience in leading complex organisations, change management, major projects, regulation and Government policy.

Penny Boys CB

Penny Boys

Penny brings to the Board a wide range of experience and expertise from a long career in public service, both at official and Non-Executive Board member level, including an eight year period as one of the first Non-Executive Directors of the water regulator, Ofwat.

As a Senior Civil Servant, Penny served in several Departments including the former Departments of Energy, Trade and Industry as well as independent regulators and competition authorities.

Sarika Patel

Sarika Patel

Sarika Patel joined the ONR Board in October 2017 for a five year term. She brings to the Board significant commercial and leadership experience in the public and private sectors, both nationally and internationally.

Sarika Patel is a business leader with nearly 30 years of public, private organisational experience. She is a Chartered Accountant and a Chartered Marketer. She is also a graduate in law.

She started her professional career at Price Waterhouse and has had senior roles in both the public and private sector She was the Director of Innovation at London Development Agency. From there she moved into the ‘advisory’ business as National Head of Technology at Grant Thornton. She then led the European operation of a large Indian conglomerate MW Corp, including running a manufacturing business based in Italy, before joining Zeus Caps. She stepped down from Zeus in Dec 2017.

Sarika has stepped down from a career in investment banking to focus on a portfolio non-executive career. She is currently is currently chair of Action for Children and a Commissioner at the Gambling Commission where she chairs the Audit, Risk and Assurance committee. She is a Trustee of the Royal Institution where she chairs the audit committee. 

She has just stepped down from the Board of Imperial Healthcare Trust where she chaired the finance and investment committee and remuneration committee.  Her previous non-exec roles include, Klopman Group of companies, vice chair of Centrepoint, and member of the Court, University of Greenwich.

She is a Chartered Accountant and Chartered Marketer and chairs the ONR Audit and Risk Assurance Committee.

Sir Simon Lister

Sir Simon Lister

Simon was appointed to the Board on 5 March. Predominantly experienced in the Defence nuclear sector, Simon brings to the Board major programme management experience in heavy engineering in nuclear power.

Simon is a graduate of the Sloan Fellowship, a Fellow of the Royal Academy of Engineering, and a graduate of the Major Projects Leadership Academy. He was appointed Managing Director of the Aircraft Carrier Alliance in September 2017 overseeing the building of the Queen Elizabeth class aircraft carriers.


Adriènne Kelbie

Adriènne Kelbie

Chief Executive

Her supportive and straightforward approach to leading ONR has brought stability and clarity of direction to the safety, security and safeguards regulator, as it modernises its ways of working, while maintaining the highest regulatory standards.

She has worked in the private, voluntary and public sectors, with twenty years at Board level, where she has driven improved customer focus, transparency, organisational development, and both staff and stakeholder engagement.

She is known as a transformational leader who is greatly interested in developing her people and learning from them.  She believes that the best teams are diverse teams, and her commitment is broadened beyond ONR, as Patron of Women in Nuclear UK.  In recognition of her promotion of public safety through diversity she was awarded the rare distinction of Honorary Fellow of the Nuclear Institute in 2017 and is Northern Power Women’s Transformational Leader 2019.

Adriènne is also a Chartered Fellow of the Chartered Institute for Personnel and Development, a Companion Member of the Chartered Management Institute, and a graduate of Oxford University’s Major Programme Leadership Academy, reflecting her interest in developing leadership by example.

She credits her team for their professionalism, knowledge and commitment, and works closely with Mark Foy, who as Chief Nuclear Inspector is accountable for ONR’s independent regulatory decision making.

Mark Foy

Mark Foy

Chief Nuclear Inspector

In 2017, Mark Foy was appointed Chief Nuclear Inspector (CNI) at the Office for Nuclear Regulation. As CNI he is the regulatory head of the organisation and executive member of the ONR Board. During the last 15 years, he has successfully led ONR’s regulatory activities across various sectors of the nuclear industry including civil reactor new build, power reactor operations, spent fuel and radioactive waste management and defence.

Mark is a Chartered Fellow of the Nuclear Institute and an accomplished nuclear safety professional with 30 years’ experience in the defence and civil sectors. He has demonstrable knowledge of the industry, the safe management of its hazards and the associated UK regulatory regime. Mark’s career encompasses many successful managerial and leadership roles within the nuclear industry. As a result, he has developed extensive in all aspects of the nuclear lifecycle, from design and commissioning through to operation and decommissioning.

Mark currently holds a number of senior international positions. He is the UK Member and Vice Chair of the EU’s European Nuclear Safety Regulators Group (ENSREG) and also sits on the Nuclear Energy Agency’s Committee on Nuclear Regulatory Activities (CNRA). The CNRA provides a forum in which senior representatives from national regulatory bodies can exchange information and experience and influence continuous improvement in regulation and nuclear safety.

Sarah High

Sarah High

Finance Director

Sarah graduated from the University of Durham in 1993 with a Geography degree and qualified as a Chartered Accountant with PricewaterhouseCoopers in 1998, working in the PwC Greater London Public Sector Audit and Advisory division until relocating to the North West in 2000. Sarah joined BAE SYSTEMS as an Internal Audit Manager and business advisor to the Operations business in 2000 before moving to EDS in January 2002 to a senior management accounting finance role supporting the DWP account. She joined the Civil Service (DWP) in May 2004 and held a variety of senior positions in the Department including Head of Commercial Support, Deputy Director of Finance (DCS), Head of Finance Policy and Practice (Resource Account lead), Head of DWP Business Intelligence, Senior Finance Business Partner for Pensions and Operational Excellence Directorates and Head of Finance Profession Capability. Sarah joined the organisation as our Finance Director in June 2016.

Dave Caton

Dave Caton

Director of Human Resources

Dave is ONR's HR Director and an Executive Board Director. A HR professional with over 30 years' experience in the public sector, he joined the Civil Service in 1984 and ONR in 2013. Dave has undertaken a range of roles providing managerial, policy and operational experience across a number of public sector organisations including Home Office, Department for Education, Government Office and Connexions. Dave was a participant on the Civil Service Fast Track Development Programme and, following roles as a senior policy adviser at Home Office and Department for Education, he focused on a career in HR. He is a Chartered Fellow of the Chartered Institute for Personnel and Development. Dave also has gained private and voluntary sector experiences through roles in insurance industry and supporting community regeneration projects.