Brexit secretary Dominic Raab is in Brussels this afternoon for a last-minute face-to-face meeting with EU negotiator Michel Barnier.
The announcement fuelled speculation that a Brexit deal may be close – potentially leading to a flashpoint for Theresa May's leadership.
"With several big issues still to resolve, including the Northern Ireland backstop, it was jointly agreed that face-to-face talks were necessary ahead of this week's October European Council," a UK government spokesperson said.
It comes after David Davis issued a dramatic call to cabinet ministers to stage a mutiny against the prime minister to kill her Brexit plan.
The prime minister will be travelling to Brussels on Wednesday for a summit where both sides hope to sign off on a draft withdrawal agreement setting out the terms for Britain's divorce from the EU.
This is despite DUP leader Arlene Foster reportedly being "ready" to trigger a "no-deal" Brexit.
She regards this as the "likeliest outcome" following a "hostile and difficult" exchange with Mr Barnier last week.
The issue of the border between Northern Ireland and Ireland is one of the last remaining obstacles to achieving a divorce deal.
Mr Davis has said Mrs May's plan to keep the UK in a customs union is "completely unacceptable" and "flawed".
Writing in The Sunday Times, the former Brexit secretary wrote: "This is one of the most fundamental decisions that government has taken in modern times.
More from Brexit
"It is time for the cabinet to exert their collective authority. This week the authority of our constitution is on the line."
It has been reported that four more letters demanding a vote of no confidence in the PM were submitted last week after three during the Tory conference, making a total of 44, just four short of the number needed to trigger a vote.