Theresa May will hold crisis Brexit talks with German Chancellor Angela Merkel in a bid to gain reassurances on her exit deal.
The move follows a day of high drama at Westminster which saw the Prime Minister cancel a crucial vote on the plans.
Mrs May is also set to meet Dutch Prime Minister Mark Rutte in The Hague on Tuesday ahead of a crunch EU summit later this week.
She was forced to abandon the Commons vote as the scale of opposition to her proposals threatened a crushing defeat.
Downing Street was unable to give any indication of when the vote will now be held. It said the date would depend on how quickly Mrs May is able to secure the assurances which will satisfy MPs.
The Prime Minister’s planned talks with Mrs Merkel and Mr Rutte on Tuesday mean the usual Cabinet meeting will be held later in the week.
They come as she faces intense pressure to make amendments to the deal, with Labour leader Jeremy Corbyn saying she should step down if she fails to do so.