Is Theresa May heading for the biggest ever defeat when she tries to push her Brexit deal through parliament?

Analysis: Up to 100 of Ms May’s own MPs could vote against her deal in the crunch vote on Tuesday. But, as Joe Watts explains, other prime ministers have fared just as badly

‘How many votes?’ (EPA)

There are few things that everyone agrees on in the Brexit debate, but one of them is that Theresa May is heading for a historic defeat on Tuesday.

Knowing the exact number of votes that she will lose by when MPs make their decision soon after 7pm on 15 January is difficult, with some last minute mind-changing likely.

But for some time now estimates have been that around 100 from her own benches could ally with the opposition parties and move against her. Even friendly MPs say it would be a victory for Ms May if the numbers of Tories opposing her is in double digits.