Dominic Cummings traveled more than 250 miles to his parents’ house at the end of March during the nationwide lockdown, the Associated Press reported.
The UK has been under lockdown since March 23 with residents told to shelter in place except for essential errands or exercise. Police visited Cummings in Durham, in northeast England, on March 31 after he was spotted at a property there but did not publicly report him at the time.
Cummings, 48, was one of the main leaders behind Brexit and was later named Johnson’s top adviser.
Johnson’s office defended Cummings’ trip to Durham, where his wife apparently was, saying she was showing symptoms of coronavirus. The office said Cummings stayed in a house separate from his family and acted “reasonably and legally.”
Two other U.K. officials, epidemiologist Neil Ferguson and Scotland’s chief medical officer Catherine Calderwood, both resigned their positions after being caught breaking lockdown rules.