The end of TTIP would be a very significant vindication of Jeremy Corbyn and John McDonnell. They have been going on about it for years.
This issue was also central, both to the Labour Leave and Left Leave campaigns that were decisive of the referendum, and to the insistence of the Conservative Party that, even after the referendum, it could only ever be led by a Remainer.
Actually withdrawing from the EU, which will never be remotely likely under the Conservatives, would also be much harder to sell to Labour if TTIP were off the table.
But so long as there had been a refocusing of the political debate in general to the areas that had voted Leave while voting Labour, then our point would still have been made.
That was what really decided the referendum. Why do you think that no one much cares that we show absolutely no sign of ever leaving the EU? Least of all now that TTIP seems to be no more.
A happy fact that is itself not unconnected to the decision of the British referendum by the Labour-voting areas.