Labour Party UK
"This is what I have left behind. It’s toxic," said the Independent Group's Luciana Berger.
But the decision is awkward for Jeremy Corbyn.
Shadow Brexit secretary rebukes adviser
She was handed a three-month sentence in January for perverting the course of justice.
But the Tory and Labour defectors have not picked a formal leader.
The five things you need to know about politics today
Jon Lansman says party has a "major problem" with anti-Semitism.
Everything you might have missed.
Labour will guarantee new rights for all workers to have flexibility over their own working hours from day one of employment
Shadow chancellor offers ray of hope for anti-Brexit campaigners.