THE Prime Minister has given his backing to his de facto chief-of-staff Dominic Cummings, despite growing calls from his backbenches to sack the aide following allegations he breached lockdown restrictions.

Boris Johnson, speaking at the daily Downing Street coronavirus briefing, said Mr Cummings had “acted responsibly, legally and with integrity”.

Conservative MPs had been baying for Mr Johnson to dispense with Mr Cummings after it emerged he had travelled 260 miles to County Durham in March to self-isolate with his family while official guidelines warned against long-distance journeys.

Leading the Government press conference for the third time since being discharged from hospital on April 12, Mr Johnson said he could “not mark down” Mr Cummings for the way he acted.

Mr Johnson said: “I have had extensive face-to-face conversations with Dominic Cummings and I have concluded that in travelling to find the right kind of childcare, at the moment when both he and his wife were about to be incapacitated by coronavirus – and when he had no alternative – I think he followed the instincts of every father and every parent.

"Though there have been many other allegations about what happened when he was in self-isolation and thereafter, some of them palpably false, I believe that in every respect he has acted responsibly and legally and with integrity and with the overwhelming aim of stopping the spread of the virus and saving lives.