Why is Starmer firing his MPs?

Last night the Prime Minister chucked four of his more rebellious MPs out of the parliamentary Labour Party. Technically, he 'removed the whip' which means that for now they cannot call themselves Labour MPs. Was he right to move against them? Does it make him stronger or weaker in his job? And what message does it send out about how Starmer wants to govern?

Later, why were key intelligence figures not informed of the Afghan data breach? And did the government mislead the courts over the severity of the situation?

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