The Prime Minister plans to bring her Brexit deal back to the House of Commons for a third so-called "meaningful vote" within days.

MPs will be given another chance to back Theresa May's withdrawal agreement with Brussels next week after it was defeated for a second time, by 149 votes, on Tuesday.

It was the fourth biggest defeat for a sitting government in Commons history - with the biggest ever being the first defeat of the Prime Minister's deal back in January.

The news of a third vote comes after parliament backed an amended government motion opposing a no-deal Brexit under circumstances.

In chaotic scenes at Westminster, the Conservatives sought at the 11th hour to whip their MPs against the amended motion, but party rebels helped it pass by 43 votes.

Scottish secretary David Mundell joined three other Cabinet ministers in defying the government whip to abstain in the final vote, but has said he will not resign his post.

On Thursday, MPs vote on if they support delaying Brexit by extending Article 50 - with the government's motion warning that if a deal is not agreed by next Wednesday, March 20, then a longer extension will be necessary.

The Prime Minister's spokesperson said: "The House needs to understand that if it's not willing to support a deal in the coming days and not willing to support leaving without a deal by 29 March, it's suggesting there has to be a much longer extension."

European Commission president Donald Tusk has said he will try to persuade EU member states "to be open to a long extension if the UK finds it necessary to rethink its Brexit strategy".

Responding to Tusk's tweet, First Minister Nicola Sturgeon said the extension vote was an opportunity to "get out of the Brexit mess" by holding a second EU referendum.