However, a Downing Street source has told the BBC that cancelling the trip would be "populist gesture" and "undo everything" achieved by Theresa May during her trip to the US last week.
The change in attitudes by Europhiles across this whole thread has been so insightful. Starting out as arrogant and aloof and deriding anyone with a view to leave they now sound miserable and pathetic. A bit like a child throwing tantrums at the checkout because mommy says no sweets.
The more that Labour are fractured the better. Throwing their toys out of the pram about article 50 still wont get the dissenters what they obviously crave.