The House of Commons will hold another vote on the Brexit Withdrawal Agreement tomorrow – the day the UK was supposed to formally leave the EU.

Tomorrow’s vote is different than the first two “meaningful votes” MPs had on the deal as it does not include the joint-political declaration on the UKs future relationship with Europe.

UK Prime Minister Theresa May was forced to remove the declaration from the vote – as House speaker John Bercow had ruled that she could not ask the house to vote again unless what was on offer was “substantially” different.

It means MPs will be asked to approve the terms of the UKs withdrawal, without giving an opinion on plans for future trading.

This afternoon, Mr Bercow told the house why he was allowing the vote to be held.

“The previous meaningful vote motion encompassed both the withdrawal agreement and the political declaration,” he said.

“This vote covers the former but not the latter.”

UK Prime Minister Theresa May leaves after attending a church service near her Maidenhead constituency, 24-03-2019. Image: Andrew Matthews/PA Wire/PA Images

Breathing space

If the deal is passed, Mrs May will have won some room to manoeuvre, as the EU will then allow the official Brexit date to be moved to May 22nd.

If it is rejected, the UK will still face the prospect of crashing out without a deal in just two week’s time – or returning to the EU to ask for a longer extension.

This would force the UK to once again elect MEPs to the European Parliament.

There has also been some speculation Brussels that could make the granting of a longer delay conditional on a second EU referendum being held.

"Blind Brexit"

After the announcement this evening, the UK Labour Party said voting only on the withdrawal agreement and not the political declaration at the same time creates "the blindest of blind Brexits."

"The problem in separating the withdrawal agreement and the political declaration is that both the EU and the PM have made clear that they are part of the 'same negotiated package' - so they can't really separate them off at this stage," he said.

"It creates an even bigger problem, which is you have a withdrawal agreement with no idea where you're heading.”

Party leader Jeremy Corbyn confirmed Labour would again vote against the deal, adding: "There's no way out of it once you have signed it and gone into it and we are not prepared to support the prime minister on this.

"We want to see a discussion about both the issues and, in particular, the crucial future arrangements and that is why we have proposed a customs union and access to markets and, crucially, protection of consumer, environmental and working rights."

British Labour Party leader Jeremy Corbyn, center, prepares to speak with the media outside EU headquarters in Brussels, Thursday, Feb. 21, 2019. Corbyn is in Brussels to meet European Union chief Brexit negotiator Michel Barnier. (AP Photo/Virginia Mayo)

Meaningful votes

Mrs May has already been defeated twice on her Brexit - in January by 230 votes and earlier this month by 149 votes.

It comes after the House of Commons yesterday rejected eight different Brexit scenarios put to it in a series of ‘indicative votes’ aimed at finding a way forward that can command a majority.

However, Mrs May secured the backing of a number of prominent Tory Brexiteers for the deal by pledging to step down if it is passed.

This would allow another prime minister to lead the second phase of Brexit negotiations on the future relationship.

The deal is still expected to be defeated as the DUP, which is propping up Mrs May’s minority government under a confidence and supply arrangement, are still refusing to back it.

A hardcore group of around 15 Conservative Brexiteers are also still opposed.