The UK’s former ambassador to the US has told ITV News the government's admission of plans for illegal Brexit deal changes is “unthinkable” and threatens all future trade deals and Britain’s standing on the world stage.

David Davis has called for Neil Basu to be pulled from an investigation into the leaking of memos from the UK's former US ambassador.

President scrapped deal to curb Tehran’s nuclear programme because it was signed by Barack Obama, according to leaked diplomatic cable.