Richard Allinson sits in for Ken Bruce. He will be doing all the same things but with slightly more hair. There will be a Love Song at 10:15 - get in touch if you want to give your special someone a mention. There will be wonderful music and your texts and emails liberally sprinkled throughout the show. And Jamie Cullum will explain why he loves another two of his favourite songs on Tracks Of My Years. Today he talks about the musician's musician and reveals what he thinks the evilest groove that exists is. To miss it, would be to miss out.