Veteran broadcaster Jonathan Dimbleby has called for an embattled BBC chief to "fall on his sword" following a row over an £800,000 loan guarantee for Boris Johnson.
Corporation chairman Richard Sharp apologised for acting as a go-between by introducing his friend, Canadian businessman Sam Blyth to Cabinet Secretary Simon Case in 2020.
Mr Blyth, a distant cousin of the ex-Prime Minister, was offering to assist Mr Johnson who was struggling to fund his lavish lifestyle.
