"A safe Labour stronghold in the south Wales Valleys, Cynon Valley is held at Westminster by Ann Clwyd, who had a majority of 19,755 over Plaid Cymru in the 1997 General Election. Third-placed were the Liberal Democrats on 3,459, and fourth were the Conservatives on 2,262. The seat forms part of the Rhondda Cynon Taff local authority, which voted Yes in the 1997 devolution referendum by 14,839 votes. The local council is in strong Labour control. Labour holds 55 of the seats, Plaid Cymru are the next-largest group, with 14, while the Independents have 4 and the Residents' Association 1. Cynon Valley is a former mining area and is home to the last deep mine in Wales, worker-owned Tower colliery. Like many south Wales communities of the kind, despite having attracted new industries, it still has relatively high levels of unemployment and social deprivation."