The Democratic Unionist Party ( DUP) is the largest Northern Ireland party in the House of Commons with eight MPs.
Former DUP leader Sir Jeffrey Donaldson, who now faces historical sexual offence charges – which he said he will be contesting – will not be standing for re-election.
Sinn Féin is currently the largest party at Stormont and at local government level.
They will want to replicate that in the Westminster poll.
Currently, they have seven MPs, but are an abstentionist party, meaning they do not take their seats in the House of Commons.
The SDLP has two MPs and Alliance has one.
Meanwhile, the Electoral Office has said the deadline for absent vote applications is Friday 14 June.
Anyone who previously registered to vote online, will be required to supply a Digital Registration Number (DRN) in their absent vote application, via the electoral office website.
