Watch: nine bombshells from Dominic Cummings
After a mammoth seven hour session, Dominic Cummings' appearance at the joint science and health committee meeting has finally ended. The former chief special adviser took aim at Cabinet ministers, Boris Johnson's fiancée, senior Whitehall officials and Jeremy Corbyn in three different segments focusing on the national lockdowns and Britain's test and trace system. Below are Mr Steerpike's guide to the highlights of the day... Cummings' relationship broke down with Boris Cummings opened up for the first time to reveal in depth why he fell out with Boris Johnson. He says his decision to quit No. 10 was linked to Carrie Symonds, Johnson's partner, trying to change various Downing Street appointments.