Eight Labour MPs including Luciana Berger and Chuka Umunna quit Labour over anti-semitism and Corbyn’s intransigence over Brexit. Then three Tory women – Heidi Allen, Anna Soubry and Sarah Woollaston – resign from the party they now say is irrevocably dominated by the hard Right and its ERG extremists. What can the Independent Group achieve and what must they do to achieve it?