Lee Cain: Johnson's senior aide resigns amid infighting at No 10

Boris Johnson had offered the current director of communications the chief of staff role, sparking protests

A row has broken out at the heart of Downing Street as one of Boris Johnson's most senior aides - and a close ally of Dominic Cummings - resigned amid bitter infighting.

Lee Cain announced he would step down as director of communications on Wednesday night after ministers and advisers including Johnson's fiancee, Carrie Symonds, are said to have protested over his planned promotion to chief of staff.