The BBC's editorial complaints unit has ruled that the broadcaster breached its own guidelines in its coverage of U2's latest album, 'No Line on the Horizon'.

The unit said that an on-screen graphic with the slogan "U2=BBC" gave an "inappropriate impression of endorsement", while a reference to the broadcaster being "part of launching this new album" during an interview was also ruled as inappropriate.

The rulings followed an official complaint made by commercial radio body The RadioCentre about the amount of coverage U2 received at the album's launch in February.

Complaints about an edition of Jo Whiley's Radio 1 show and an online report of U2's rooftop set at the BBC were not upheld.