Royal Bank of Scotland is keeping a close eye on the Irish border issue in the Brexit negotiations, as the final agreement could have implications for its operations in both Northern Ireland, which is part of the UK, and the Republic of Ireland.

In an interview with CNBC late yesterday, chief financial officer Ewen Stevenson said: "We've also got a very big banking operation in Ireland and the biggest banking operation in Northern Ireland, so the nature of the border between Northern Ireland and Ireland is also an important issue to us in terms of what we have to structurally do."