Constituency Profile: If one constituency illustrates the onwards march of Sinn Féin on the one hand, and the DUP on the other, it is this one.
The constituency was formed only 20 years ago and it now comprises all of the local government districts of Coleraine and Limavady.
It is just over two-thirds Protestant, and with an electorate of 56,200 on the current register, it is also one of the smallest seats in Northern Ireland.
The election was called last month with the Democratic Unionists represented here by Mr Gregory Campbell and the Ulster Unionists by Ms Pauline Armitage and Mr David McClarty.
Mr Arthur Doherty and Mr John Dallat were elected for the SDLP, while Mr Boyd Douglas represented the United Unionist Coalition, a small party including Mr Fraser Agnew in North Belfast.
The scenario is very different now. Ms Armitage fell foul of the Ulster Unionists and is now standing under Mr Bob McCartney's UK Unionist banner.
This leaves the outgoing assembly member, Mr David McClarty, joined by Mr Normal Hillis and Mr Arthur Stevenson.
Running alongside Mr Campbell, who took this Westminster seat from the UUP's Mr Willie Ross in 2001, are Mr John Bradley and Mr George Robinson.
Mr Arthur Doherty, a respected SDLP stalwart, resigned his seat last year shortly before his death and was replaced by a party colleague, Mr Michael Coyle. Mr Dallat has carved out a useful profile which could serve him well as he fights to defend the SDLP share of the vote.
Privately, some senior SDLP figures admit the party will have it all to do to retain its two seats against the Sinn Féin challenge.
That party is running two candidates, Mr Francis Brolly and Ms Cliona O'Kane, and insiders say that one seat is all but in the bag.
SDLP support has slipped since 1998 just as the Sinn Féin vote has risen.
Unionist politics since 1998 has witnessed much more turmoil, and the presence of two unionist "dissidents" makes prediction about the outcome more difficult.
However, the progress of the DUP and the taking of the Westminster seat in 2001 point to trouble for the Ulster Unionists.
Ms Armitage's decision to run for the UKUP could mean she takes some traditional UUP voters with her.
Mr Douglas may retain his seat. Like other small parties, the United Ulster Coalition denies a drift in support despite claims from many other observers that this election will be tough on all but the biggest four parties.