The Foyle seat has at its heart Northern Ireland's second largest city. Its official title of Londonderry is used mainly by Protestants, but Catholics - who make up the majority of its population - refer to it as Derry. As a result, in order to avoid offence to either community, the Boundary Commission named the seat after the River Foyle, which flows through the city.
It was the rioting here in 1969 which persuaded the then Home Secretary, James Callaghan, to send troops to Northern Ireland. On 30 January 1972 soldiers from the Parachute regiment killed 13 marchers during a civil rights rally in the Bogside - an event remembered as Bloody Sunday. A fourteenth man died later in hospital. Those events remain controversial today and an inquiry has been sitting since March 2000 to determine what happened.
The SDLP won more than 50% of the vote in 1997, with Sinn Féin in second place. The Ulster Unionists have not run in Foyle for Westminster, instead giving the DUP a clear run.