Both Theresa May's government and the opposition Labour Party said Sunday that their talks represented the best chance of finding a Brexit solution and ending months of deadlock.

But even as David Lidington, May's de facto deputy, said there was common ground between the two sides, a former leader of May's Conservative Party called on her to end the discussions, pull Britain out of the European Union and then resign as prime minister.

Parliament is in recess until April 23, but the negotiations will continue. Lidington told the BBC on Sunday that the talks involved "testing" possible solutions, and both sides will have to make concessions.