If it’s good enough for

said that the system that sets public spending levels across the UK – the Barnett formula – would mean Scotland getting a similar sum.

Mundell said: “The Barnett formula is to Scotland’s advantage. I’m not going to do anything to prejudice that. Any funding that goes to Northern Ireland, then Barnett rules will ensure the appropriate funding comes to Scotland.”

He added: “We’re going to have a totally transparent arrangement with the DUP.

“I’m not going to agree to anything that could be