The BBC has issued a brief apology after accidentally screening an image of Prince William - with a penis doodled on his head.

The mistake happened during the BBC Breakfast show, when a clip of a video by a barbershop quartet called Barbershopera was played on the show.

The quartet, made up of three men and one woman, were seen smartly dressed in a drawing room-style setting, with newspapers laid out on a coffee table in a clip from their song "I could have married Kate". Unfortunately, one of the papers had a picture of Wiliam in it which had been defaced.

After the show yesterday, the BBC said in a statement: "This image was shown fleetingly within a comedy promotional video for Barbershopera, a humorous barbershop group, who were appearing later on in the programme."The material was provided by Barbershopera but we failed to spot the offending material within it. We apologise for this."