The remainder of the group, including Radio 1 DJ Chris Moyles and pop star Alesha Dixon reached the summit later.

BBC: Celebrity climbers reach summit

But these ratings were recorded before afternoon DJ Chris Moyles took on its flagship breakfast show, trading places with Sara Cox.

BBC: NEWS | Entertainment | Wogan show boost for BBC Radio 2

Former Radio 1 breakfast host Chris Moyles, who presented his final show on 14 September, continued to lose listeners in his final months.

BBC: Record ratings for digital radio stations