This seat has been in long-term Labour control and boasts many MPs who have reached the top in British and Welsh politics.
Former prime minister James Callaghan held the seat in its various forms from 1945-1987.
He was followed by Alun Michael, who became secretary of state for Wales and first secretary of the National Assembly, until he resigned on 9 February 2000.
The constituency includes two very distinct areas, in two local authorities.
The wards in Cardiff are largely traditional working class, including Butetown, Grangetown and Splott. It includes the old docklands - now reborn as the regenerated Cardiff Bay. These sections of the city are home to a multitude of ethnic groups.
Some of these areas were previously, to many, no-go areas, but the regeneration of south Cardiff, has led to an influx of largely white, young, middle class residents.
Many of these have moved into new luxury accommodation, around Cardiff Bay, home of the National Assembly.
The second half of the constituency also share views of the Bay, the Barrage, and the recently created freshwater lake, but Penarth in the Vale of Glamorgan, is generally more prosperous.
Consequently, it is politically, as well as socially, more conservative.