Not now Colin

Radio One's covert assault on proper music is set to gain significant ground this week, as the station waves goodbye to Colin Murray's long-standing weekday evening slot. Colin - who will host a new show on Radio 5 Live - is to be replaced by Nick Grimshaw: a man for whom music represents nothing more than accompaniment to the sight of Alexa Chung snorting cocaine off the spade that hit Peaches Geldof in the face.

Grimshaw's appointment completes a kind of Holy Trinity of shite than begins with Chris Moyles in the morning and is then made worse by Scott Mills in the afternoon to early evening. 'Wake up with Moyles... Get home with Mills... Swallow some bleach with Grimshaw.' There has to be a thread of logic behind this change of the schedule - Colin's show was, at times, dangerously geeky and he may well be busy with his work as a commentator on anything with a score line. But to my mind, it just feels like one more step away from Peel and three more towards a radio station transmitting round the clock celebrity fart impersonations.