I mentioned Teresa May, not in relation to Boris, but to Bridget. One was a remainer, who tried to do her job, even though it went against what she originally wanted, the other just chose to do what she wanted.
As for Boris, if this is true, and I wasn't aware that it was, then if he changed his mind to suit the narrative then he was wrong to do so. Is this not typical of politicians though. Just out to feather their own nests? Don't forget, Churchill, arguably one of the finest statesmen of the 20th Century, changed political parties. Did he do this for political gain, or as a matter of principal?