Boris Johnson under pressure to explain how private office follows funding rules

Office is part-funded by public duty costs allowance, which should only be used to support public work of former PMs

Boris Johnson is under mounting pressure to explain how his private office complies with rules over taxpayer subsidies after further revelations about how his staff appear to be overseeing his global commercial operations.

A leak of data from the Office of Boris Johnson appears to show all three of his staff helping Johnson’s business and profit-making ventures.