Jeremy Corbyn told the Prime Minister the leadership challenge she faces today is "irrelevant to the lives of people" across the UK.
The Labour leader made the comment during Prime Minister's Questions, which took place shortly after Theresa May vowed to "contest" a no-confidence vote called against her by MPs.
"Whatever happens with her Conservative leadership vote today it is utterly irrelevant to the lives of people across our country," Corbyn said.
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"It does nothing to solve the government's inability to get a deal that works for the whole country."
Theresa May's husband, Philip May, was in the public gallery during the House of Commons debate, in which a furious Corbyn criticised her over pulling a vote on the Brexit deal.
"The time for dithering and delay by this government is over," Corbyn said.
"There can be no more excuses, no more running away. Put it before Parliament and let's have the vote."