Britain’s health secretary said Wednesday that national lockdown rules were “for everyone,” after one of the government’s key scientific advisers quit for receiving secret visits from his girlfriend amid the coronavirus pandemic.

Imperial College epidemiologist Neil Ferguson developed models that predicted hundreds of thousands would die unless the U.K. imposed drastic restrictions to slow the spread of the coronavirus. His advice was key in triggering Britain’s lockdown in March. Under the rules, people are barred from visiting friends and family that they don’t live with.