Lewis served on the Work and Pensions Select Committee and the Regulatory Reform Select Committee from his election until 2012. He has been a member of a number of All Party Parliamentary Groups, including time as the chair of the Local Growth group and co-chair of a group discussing coastal erosion. A report by the Local Growth group in September 2012, when it was chaired by Lewis, criticised the government for an "uncoordinated" approach to its Local Enterprise Partnership policy which, according to Lewis, left "gaps and weaknesses".