In January, Sharp asked the BBC board to investigate his appointment as the BBC chairman amid reports of Johnson's alleged involvement in the process in exchange for helping the country's ex-leader secure a loan.
Earlier that month, media reported that Sharp, who was recommended for the top BBC job by Johnson in 2020, had helped the former UK leader arrange a guarantor on a loan of some 800,000 pounds ($990,000), which sparked calls for investigating a possible conflict of interests in Sharp's appointment process.