The BBC's governors have said a Ten O'Clock News report broke the corporations' rules on impartiality.

Guto Harri's story on an edition of Question Time reported that the then Conservative leader Michael Howard was booed but did not mention the booing of Tony Blair.

They did, however, rule that the overall piece have a "fair and balanced" view of the event and refused the allegation that there was evidence of political bias.

A Conservative Party spokesman said: "This ruling will serve as a reminder to the BBC that they must meet the highest standards of accuracy and impartiality."