Mathew Duncan is an External Member of the House of Lords Commission. He is currently the Chief Financial Officer for Tideway, the company responsible for financing, delivering & maintaining the Thames Tideway Tunnel, which is a new 25km tunnel being built under the River Thames to intercept, store and ultimately transfer sewage waste away from the river. Prior to Tideway, Mathew was the Finance Director of Crossrail Ltd which is delivering the new high frequency, high capacity railway for London and the South East. He was previously interim CEO and former Finance Director at Balfour Beatty Support Services, where he was responsible for key business sectors such as UK rail and utility operations, as well as a workforce of 8,500 people. He joined Balfour Beatty in 2000 as Finance Director of the Utility Solutions business, having previously held a number of senior roles in various industries.