Unite leader Len McCluskey said yesterday that the union movement would be “the one constant” in Scotland before and after September’s independence referendum.

He told delegates that he didn’t address the thorny issue in his conference address on Monday “because I was saving the best until last.”

He set out the benefits of the union’s position of “positive neutrality” in the debate during his closing speech.

“Our members up there are not recommending either a Yes or a No but insisting that the debate is about working people, their concerns and their aspirations,” he said.

“We’re determined that the fabric of society will not be broken whatever the result. The one constant before and after the referendum will be the trade union movement.”