Calls have been made for Dominic Cummings to resign from his role as chief adviser to the Prime Minister after reports emerged he broke lockdown rules by travelling 260 miles from his London home. In a joint investigation, the Mirror and the Guardian reported that police intervened after receiving a tip-off that Mr Cummings had travelled to his family home in County Durham to self-isolate, despite Boris Johnson having declared a lockdown in England days beforehand.