The country's top civil servant said Boris Johnson was "mad" if he did not believe his private WhatsApp messages would become public as part of the UK Covid-19 Inquiry.It comes as a former top aide to Mr Johnson suggested he was worried about leaks from the heart of Government, amid questions about why he had turned on the "disappearing message function" on a WhatsApp group in April 2021.Martin Reynolds also made repeated reference to former chief adviser Dominic Cummings - due to appear before

The country's top civil servant said Boris Johnson was "mad" if he did not believe his private WhatsApp messages would become public as part of the UK Covid-19 Inquiry.It comes as a former top aide to Mr Johnson suggested he was worried about leaks from the heart of Government, amid questions about why he had turned on the "disappearing message function" on a WhatsApp group in April 2021.Martin Reynolds also made repeated reference to former chief adviser Dominic Cummings - due to appear before the inquiry on Tuesday - and the "unusual dynamic" he brought to Downing Street.