Foyle is an overwhelmingly nationalist constituency named after the river which runs through the constituency.
The outgoing MP is SDLP's Mark Durkan.
Over 66,000 people can vote here.
Derry is the only remaining completely intact walled city in Ireland, it claims Europe's largest collection of cannon whose origins are known precisely.
It is home to the world's oldest independent department store Austins.
For tonight's report our north-west reporter Keiron Tourish is at a former military base which is going to be transformed in the years ahead.
BBC NEWS CHANNEL
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