PRIME Minister Boris Johnson has given his backing to senior adviser Dominic Cummings, despite growing calls from his backbenches for him to be sacked following allegations he breached lockdown restrictions.

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

Some backbench Conservative MPs had called for Mr Cummings to be sacked 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.

Further reports also suggested he took a second trip to the North East in April, having already returned to London.

Mr Cummings denied the fresh allegations, which were reported by the Observer and the Sunday Mirror, and Mr Johnson announced he would be standing by his most senior aide.

Leading the Government's daily press conference today, Sunday, 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.

"And I do not mark him down for that.

"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."