Boris Johnson declined to answer questions about Richard Sharp, the BBC chair who resigned after a report found he failed to declare two conflicts of interest during his appointment process.

Mr Sharp, a Conservative Party donor, helped the former prime minister secure an £800,000 loan facility weeks before he appointed him to the top position.

The review, compiled by Adam Heppinstall KC, also concluded that there was a risk it would be perceived that Mr Sharp influenced Mr Johnson to recommend him for BBC chair by notifying the former prime minister of his application before submitting it.