The government has denied claims that Mr Cummings made two trips to Durham.
The Transport Secretary Grant Shapps insisted Mr Cummings stayed put after his initial 260-mile drive to Durham.
But once there, did he strictly observe lockdown rules? One eyewitness accused him of driving to Barnard Castle some thirty miles from Durham in order to exercise – a claim that has angered some locals.
From Barnard Castle, here’s our Senior Home Affairs Correspondent Simon Israel.