BBC Newsline takes a look at the issues in Belfast East, where unionists from various parties have always held the seat.
Almost 59,000 people can vote here.
The sitting MP is Peter Robinson of the DUP.
East Belfast is the most Protestant of all the constituencies, it also has the lowest population as well as the highest proportion of "other" Christian denominations.
BBC Newsline's Tara Mills has been looking at unemployment in the area.
BBC NEWS CHANNEL
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