Major and Blair say an EU exit could split the UK

                               

Sir John Major and Tony Blair warned a vote to leave the EU will "jeopardise the unity" of the UK as they campaigned together in Northern Ireland.

They suggested a Leave vote may re-open Scotland's independence issue and put Northern Ireland's "future at risk" by threatening its current stability.

But Northern Ireland Secretary Theresa Villiers said support for the peace process there was "rock solid".

She said it would be "highly irresponsible" to suggest otherwise.

Northern Ireland first minister and DUP leader Arlene Foster said she found the intervention "rather sad".

She told journalists "I do find it rather disgraceful for two prime ministers who know full well the importance of the peace process here in Northern Ireland to come over here and suggest that a vote in a particular direction is going to undermine that".