Category: Very safe Labour seat

Geography: Wales, Mid Glamorgan. Part of the Rhondda Cynon Taf council area.

Main population centres: Pontypridd, Treforest, Rhydyfelin, Beddau, Llantwit Fardre, Llantrisant, Pontyclun, Tonyrefail.

Profile: Covers the lower Taf and Ely valleys. This seat is very much the transition point between the traditional, struggling, post-industrial towns of the Welsh valleys and those commuter villages and new build developments that lie in the orbit of Cardiff to the south. The Royal Mint, the government owned company that produces all UK coinage, is based here in Llantrisant. Two of the University of Glamorgan`s campuses are also here, based in Pontypridd.

Politics: Pontypridd has been held by Labour since the 1920s, but is less monolithically Labour than those seats deeper into the Welsh valleys. In 2010 the Liberal Democrats cut the Labour majority to under ten percent, but they slumped to fourth place in 2015.