A top EU official has said the UK could still reverse its decision to leave the European Union.
Martin Selmayr, who is Jean-Claude Juncker's chief of staff, said it was still legally possible for the UK to turn back from its current path.
Speaking at a press conference in Brussels, Selmayr branded Brexit "bad" and the vote to leave "stupid."
His comments were described as "pig-headed" by Nigel Farage, the former leader of Ukip.
Selmayr's remarks come at a time when the UK and EU are at odds over the progress of the exit negotiations.
They were also made ahead of a crucial vote in Parliament on the proposed EU withdrawal bill, or the Great Repeal Bill.