Palestine Action protesters at London HQ of weapons firm Sir Keir Starmer is facing calls to sack four Labour MPs over their historic links with Palestine Action after six members of the radical group were arrested on Sunday. The Met Police swooped in and nabbed the extreme political activists after the Daily Express revealed secret plans to “ shut down ” the London Stock Exchange on Monday.A reporter, posing as an activist within the group, was told they planned on locking themselves together,