A junior Wales Office minister has quit over the prime minister’s decision to turn to Jeremy Corbyn to try to get a Brexit deal through Parliament.
Nigel Adams said the decision was a “grave error” and the UK would now “end up in a customs union” with the EU.
Mr Adams, who was also a government whip, said he believed the UK would have coped with a “managed no-deal”.
He became the fourth Wales minister to have the job within 12 months when he took up the role last November.
Theresa May is to meet Mr Corbyn later to see if they can formulate a deal both sides in Parliament can agree to.
She said if it was not possible to agree, they could choose a series of options