Only convenient nits are picked, though. It is all very well quoting "Labour accepts the referendum result and a Labour government will put the national interest first" but what happens when sunsequent analyses convince you in the sincere belief is that those two clauses are in conflict? Do you follow Brexit in the sincere belief it does harm to the national interest? Or do you put the national interest first in accordance with the manifesto even if that means no Brexit.

Each Labour MP will have to decide, but it is simply wrong to say their manifesto commitment obliges them to take one clause rather than the other.