On 24 January 2017 David Davis said: "We have come up... the idea of a comprehensive free trade agreement and a comprehensive customs union that will deliver the exact same benefits as we have." 
Yesterday Theresa May said: "Our access to each others markets will be less than it is now." So the assurance given by David Davis will be breached.
On 26 June last year, @Keir_Starmer promised, in absolutely unequivocal terms, that Labour would hold David Davis to his promise. So Labour *must* - there is no logical alternative - vote against the Government's deal.
More than that, as Theresa May is finally starting to be straight about what Brexit means, Labour should say now, so that the Government understands, that it will honour Keir's categorical assurance and vote against Theresa May's deal.
It is clear that Keir Starmer's position is the position of Labour's front bench: see this amendment to the Queen's Speech that was moved by John McDonnell and voted for by Jeremy Corbyn (goo.gl/yvC2rG).
