"... Labour MPs are growing increasingly frustrated with the government's U-turns.

Some had already been wary of defending controversial government policies to their constituents because they feared that the policy would inevitably be reversed."

which implies that the MPs are openly admitting that they don't state their personal opinions, merely parrot the party line, but are frustrated when they are required to abruptly change the things they claim to believe in.

What a farce. Members of parliament should have their OWN fucking views about things, and defend or debate those views on behalf of the people they represent.