Good riddance. This will be the sentiment amongst grassroots Labour members towards today’s news that a group of seven Blairites are splitting from the party. Delight at their departure will be mixed with immense anger towards the treacherous role that these right-wingers have been allowed to play over the past few years. The task now is to kick out the rest of the saboteurs who remain at large inside the Parliamentary Labour Party. This is why we need mandatory reselection.