British MPs on Tuesday voted for an amendment, supported by Prime Minister Theresa May, calling on her to change the unpopular Brexit deal she struck with the European Union.
MPs voted 317 to 301 in favour of the amendment asking May to replace the deal's so-called backstop provision preventing a hard border with Ireland.
Parliament also voted in favour of an amendment excluding a "no-deal" Brexit, although the result is not binding on May.
MPs voted 318 to 310 in favour of the amendment, undermining the government's argument that Britain would be willing to crash out of the European Union without an agreement.
However a spokesman for EU leader Donald Tusk said the withdrawal deal between Britain and the other 27 EU members is "not open for renegotiation".
Tusk, whose European Council represents EU leaders, had spoken with them after May demanded changes to the accord following a vote in parliament.
"We continue to urge the UK Government to clarify its intentions with respect to the next steps as soon as possible," the spokesman said. (AFP)