The Great Grimsby MP Melanie Onn has joined her fellow Labour MPs in Hull and resigned from her role on the front bench.
Angela Eagle is to launch her Labour leadership contest on Monday, but how does it work?
Labour leadership challenger Angela Eagle has told Peston on Sunday that she is fighting to save her party.
Labour has descended into crisis as several high-profile members of the shadow cabinet have quit in the past few hours. Here's who they are.