 The mining areas in the north of the constituency, including the lower reaches of the Rhondda, and the cosmopolitan town of Barry were strongly Liberal but these were juxtaposed against the conservatism of the Vale of Glamorgan and the genteel settlements of Penarth and Llandaff.The constituency was abolished for the 1918 general election.Created in the redistribution of seats in 1885 from the old Glamorganshire constituency which had been in existence since 1541, the seat covered a wide area that included Bridgend, Porthcawl, Coity, Ewenny, Ogmore, Llanharry, Llanharan, Llantwit Major, Dinas Powis, Pendoylan, Bonvilston, Barry, Penarth, Tonyrefail, Pontyclun and Beddau, and areas which are now part of Cardiff (including St Fagans, Radyr, Whitchurch, Llanishen and Lisvane).