- Labour MP Alun Michael has held the seat since 1987
- In 2010, he won with a majority of 4,709
- It is Wales' biggest constituency according to the size of the electorate
- The turnout in 2010 was 60.2%
Labour's Stephen Doughty is the new MP for Cardiff South and Penarth. He won by 5,334 votes, a small increase on the majority claimed by his predecessor Alun Michael in 2010.