There is a certain inconsistency in the posting by remainiacs here.
On the one hand they argue an MP should vote (as instructed by the whips)as guided by his superior knowledge(Does anyone, other than a lefty, really believe such nonsense?) and on the other hand encourage them to lie through their teeth and deliberately deceive their electorate in order to be elected. They then try to explain away the deliberate lying by calling it real politik.

A reminder:MPs backed the government's European Union Bill, supported by the Labour leadership, by 498 votes to 114.
Shortly after there was an election with both main parties supporting brexit.
The subsequent beviour of remainiac MPs suggests they will lie cheat and steal from their grannies in order to be re elected, and see no harm in betraying their electorate in many constituencies.

The next election will be a grand settling of scores and probably remap British politics for a considerable period of time.