Boris Johnson is a liability for Britain, says John McDonnell

Labour has called Boris Johnson a liability for the UK who “undermines our credibility” after the foreign secretary failed to gain the backing of fellow G7 foreign ministers to penalise Russia and Syria over last week’s chemical weapons attack.Downing Street had insisted Theresa May fully backs Johnson after the 30-page communique from the two-day G7 summit in Italy failed to make any mention of Johnson’s proposal of imposing sanctions on key military personnel.