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Non-executive chairman
Kevin Whiteman
The chairman, Kevin Whiteman, is mainly responsible for managing the business of the board, evaluating its performance and setting the agenda for board meetings to ensure that adequate time is allocated to the discussion of all agenda items, facilitating the effective contribution of all directors. The chairman acts as an ambassador for the Company and provides effective communication between the board and its shareholders.

The chairman, together with the Company secretary, ensures that the directors receive clear information on all relevant matters in a timely manner. Board papers are circulated sufficiently in advance of meetings for them to be thoroughly digested to ensure clarity of informed debate. The board papers contain the chief executive officer's, the Group finance director's and chief operating officer's written reports, high-level papers on each business area, key metrics and specific papers relating to agenda items. The board papers are accompanied by a management information pack containing detailed financial and other supporting information. The board receives occasional ad hoc papers on matters of particular relevance or importance. The board also receives presentations from various business units and senior managers, including members of the executive committee.
Chief executive officer
Alan Dunsmore
As the senior executive of the Company, Alan Dunsmore is responsible to the chairman and the board for directing and prioritising the profitable operation and development of the Group. The chief executive officer is responsible for the day-to-day management of the operational activities of the Group, assessing and implementing strategy and implementing the board's decisions.

The chief executive officer chairs an executive committee consisting of the members indicated on Our executive committee. This committee assists the main board by focusing on strategic and operational performance matters relating to the business and meets formally on a monthly basis. He also, together with the Group finance director and chief operating officer, holds quarterly meetings with each of the business unit boards to review all operational issues and meets with an executive risk committee comprising himself, the Group finance director, chief operating officer and the Group legal director on a weekly basis to discuss any key issues affecting the business.

In addition, he chairs a safety leadership team ('SLT') and a Group human resources ('GHR') meeting once a month, both of which consist of certain other members of the executive management team and business unit managing directors. He is also chair of the sustainability committee which meets every two months to oversee implementation of our sustainability strategy and review progress against our strategic objectives.
Senior independent director
Alun Griffiths
Alun Griffiths is the senior independent non-executive director whose role is to provide a sounding board for the chairman and to serve as an alternative source of advice to the chairman for the other non-executive directors. The senior independent director is available to shareholders if they request a meeting or have concerns, which contact through the normal channels has failed to resolve, or where such contact is inappropriate. He also leads the performance review of the chairman and the board, taking into account the views of the executive directors.
Board committeesThe board has established three standing committees, all of which operate within defined terms of reference, which are available from the Company secretary by request and published on the website. The terms of reference for the audit and nominations committees were updated during the year.

The committees established are the audit committee, the remuneration committee, and the nominations committee. Trading companies are managed by separate boards of directors. Any matters of a material nature concerning the trading companies are reported to the board on a monthly basis.

Details of the work of the audit, nominations and remuneration committees are set out in theĀ Audit committee report, Nominations committee report and Director's remuneration report.