PM says he is sorry for believing ‘lies’ told by former Labour minister and that he too is ‘angry and frustrated’UK politics live – latest updatesKeir Starmer has attempted to reboot his faltering premiership, apologising for appointing Peter Mandelson as US ambassador and urging his MPs to unite behind him.The prime minister gave a lengthy speech on Wednesday about community cohesion, but faced a barrage of questions about his leadership after one of his most turbulent days since entering Downing Street. Continue reading...