Sir Keir faced an open challenge to his authority as Labour leader today as a senior shadow minister refused to punish one of her team for supporting striking rail workers.
Shadow Transport Secretary Louise Haigh ruled out action against Sam Tarry, after the shadow local transport minister joined RMT members on the picket line on Monday.
Mr Tarry, a leftwinger who is close to deputy leader Angela Rayner, tweeted a picture of himself with RMT members in London as they and 40,0000 others…
