Radio 1's Breakfast show lost 550,000 listeners year-on-year in Nick Grimshaw's first quarter as host, as Chris Evans' Radio 2 numbers grew by nearly 1 million.

Newly-released Rajar figures show 6.69 million people listened to Grimshaw's breakfast programme during the last three months of Q4, the first full quarter he hosted the show since taking over from Chris Moyles on September 24.

That represented a 551,000 audience drop compared to the same period in 2011, a fall of 7.6%, while quarter-on-quarter ...