The Democratic Unionist Party's hard-line stance against gay marriage and its opposition to a hard Brexit are issues that could be stumbling blocks in any attempt to forge a coalition with the Tories.

Northern Ireland's largest unionist party has in the past been condemned by David Cameron for its long opposition to allowing gay marriage in Northern Ireland.

Northern Ireland is the only remaining part of the UK where same-sex marriage is not legal and the DUP has used a controversial veto mechanism to block any change to legislation. Senior figures in the party have called the issue a "red line" for power sharing talks at Stormont.