Britain and the EU on Thursday traded claims about who would be responsible for the failure of a new Brexit deal unveiled by London as the country faces a messy exit from the bloc at the end of October.
British Prime Minister Boris Johnson warned the bloc's failure to listen to his new proposal would result in it sharing the blame for a likely chaotic divorce.
Johnson has until October 31 to try to muster support for a fresh approach, which focuses on complicated proposals for preserving a free-flowing border between British-run Northern Ireland and the Republic of Ireland after Brexit.
But he is facing headwinds across European capitals and his own parliament.
Failure to get both the 27 EU leaders and UK lawmakers to back his plan will result in either a crash exit for Britain or a third Brexit delay this year.
Johnson reaffirmed on Thursday he had no intention of seeking an extension despite parliament's instruction to do so should he fail to secure a new agreement over the next two weeks.
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"We have shown great flexibility without our European friends," Johnson told parliament one day after publishing the details of his long-awaited plan.
"If our European neighbours choose not to show a corresponding willingness to reach a deal, then we shall have to leave on October 31 without an agreement -- and we are ready to do so.
"But that outcome would be a failure of statecraft for which all parties will be held responsible."
"We need to move forward at pace, intensively," he told BBC radio. "All sides recognise that the alternative, no-deal, is disruptive."
"It seems to be a pretty solid majority, and it's one that the EU can take reassurance from as well because one of the concerns that the EU had in the past (was that) look, if we make a concession, will it get through parliament?"