It is now all in the numbers. For government whips, advising Downing Street on whether to bring Theresa May’s Brexit deal back to parliament this week, they have to calculate how many of the 75 Tory MPs who voted against the meaningful vote last Tuesday can be brought back into the fold. Here we look at the groupings and how likely they are to switch sides.

Switched already (4 MPs)

Four Brexiteers who voted against the prime minister’s deal last Tuesday have already publicly stated they will switch sides. This group includes Esther McVey, the former work and pensions secretary who resigned in protest at Mrs May’s deal in November. It also includes Daniel Kawczynski, who until last month was lobbying the Polish government to