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 mining regions in the northern part of the constituency, including the lower sections of the Rhondda, and the culturally diverse town of Barry were predominantly Liberal, whereas these were contrasted with the conservatism of the Vale of Glamorgan and the refined communities of Penarth and Llandaff.