Complex sentence: Northolt is made up of two wards (Northolt Mandeville and Northolt West End) since the 2002 local elections both the Conservatives and the Labour Party have had an equal number of councillors--three Conservatives in Mandeville, three Labour in West End Ward.
Split into simpler sentences: Northolt is made up of two electoral wards (Northolt Mandeville and Northolt West End). Since the 2002 local elections both the Conservatives and the Labour have had an equal number of councillors--three Conservatives in Mandeville, three Labour in West End ward.