MPs are voting on Theresa May's Brexit deal after she made a final bid to convince them to back it. Battling a sore throat after late night talks with the EU, the prime minister urged MPs to vote for her "improved deal" or risk "no Brexit at all". But some leading Tory Brexiteers and the DUP, who keep her government in power, have rejected the deal. They say the legal assurances secured by the PM are not enough to prevent the UK being tied permanently to the EU. Sir Bill Cash, a leading Brexiteer, said: "In the light of our own legal analysis and others we do not recommend accepting the government's motion today." Sir Bill was part of a panel of legally-trained Brexiteer MPs who examined the PM's revised deal, concluding that it did not deliver the binding changes MPs had demanded. Another Brexit-supporting Tory, Jacob Rees-Mogg, said he had not yet decided which way to vote. Conservative MP Simon Clarke, leaving a meeting of Mr Rees-Mogg's European Research Group, said a "majority" of the group would vote against the deal. The DUP said in a statement that "sufficient progress has not been achieved at this time". Commons Speaker John Bercow did not select any of the amendments to the government motion that had been tabled by MPs. With husband Philip watching from the public gallery, Mrs May made a final plea to MPs to "come together" and "prove beyond all doubt that democracy comes before party, faction or personal ambition". "This is the moment and this is the time," she said. "Back this motion and get the deal done, because only then can we get on with what we came here to do - what we were sent here to do. "We cannot serve our country by overturning a democratic decision of the British people." The UK is due to leave the EU on 29 March. MPs voted overwhelmingly to reject the PM's deal on 15 January by 432 votes to 202. Labour leader Jeremy Corbyn said that "after three months of running down the clock" the prime minister had "achieved not a single change to the withdrawal agreement". He said it was the same "bad deal" MPs had rejected in January and Labour would be voting against it again because it "risks people's living standards", jobs and the NHS. As things stand the number of switchers seems far less than required to avoid another defeat for the prime minister. Last time out she was beaten by a record 230 votes. One cabinet minister guessed the number tonight might be around 150. Everyone is guessing still. But this looks like another dreadful day for Number 10, and another moment when doubts will be on display about not just the divorce deal with the EU, but about the prime minister's leadership too. AFP.