Lawmakers from Britain's ruling Conservatives Party on Sunday called for the resignation of Dominic Cummings, the senior adviser to Prime Minister Boris Johnson who travelled 400 km (250 miles) to northern England during the coronavirus lockdown. Cummings, who masterminded the 2016 campaign to leave the European Union, travelled from London to Durham in late March while his wife showed COVID-19 symptoms, when measures to combat the spread of the coronavirus were in place. Johnson's office said Cummings made the journey to ensure his 4-year-old son could be properly cared for as his wife was ill with COVID-19 and there was a "high likelihood" that Cummings would himself become unwell.