Mike entered the House of Lords on 29 June 2010 and was appointed Party Treasurer in December 2015. He was previously a member of the National Assembly for Wales for the South Wales East region and was leader of the Welsh Liberal Democrats from 2007-2008.
In 1996 he was awarded an OBE for his public and political service.
Between 2015 and 2016 he was the Liberal Democrat Work and Pensions Spokesperson. In October 2016 he was appointed Lords Spokesperson for Rehabilitation, Probation and Prison Reform