Talks between the DUP and Ulster Unionists on maximising the unionist vote had been expected this week, but will not now take place.

It had been hoped that the discussions would take place on November 13 or 14, but the UUP has confirmed that it proved impossible to find a time to meet.

A spokesperson has insisted the discussions are not off, but simply on hold.

When the parties meet, voting pacts, strategies for increasing unionist turnout and the possibility of running single unionist candidates in South Belfast and Fermanagh and South Tyrone (in a General Election) will be on the agenda.

However, if the UUP and Tories do some sort of co-operation deal which will see them run on a joint ticket at forthcoming elections, it is firmly understood that they will not be stepping aside in any constituencies – meaning a long anticipated UUP-DUP deal in South Belfast and Fermanagh cannot happen.

The Conservatives have made it clear they intend to run in every single constituency in the United Kingdom at the next General Election and sources say that pledge will be kept.

This is sure to create ructions between the DUP and Ulster Unionists and lead to accusations that the UUP is playing into the hands of nationalism in both seats.

It would also undermine the effectiveness of any pact between the main unionist parties.