Also, however, it is one of eight constituencies in the South Wales East electoral region, which elects four additional members, in addition to eight constituency members, to produce a degree of proportional representation for the region as a whole.

Labour have had large majorities but following the By-election in 2006 Blaenau Gwent People's Voice gained the seat, with the previous incumbent Peter Law's wife Trish Law taking the seat and holding it in the 2007 National Assembly for Wales election.

The party did not stand in the 2011 election and Labour regained the seat with a very large majority.

Blaenau Gwent People's Voice won the seat in the 2006 by-election and the 2007 election.

Want of an Official Mark (0), Voting for more than ONE party or individual candidate (50), Writing or mark by which the Voter could be identified (0), Unmarked or Void for uncertainty (115) Regional ballots rejected at the count: 171[8] 2003 Electorate: 52,927 Regional ballots rejected: 300