The 'Big Gig' which takes place at London's Marquee on Leicester Square in London will feature performances from, among others, Gwyneth Herbert, Brand New Heavies and Sony Music's young hopeful Jamie Scott.
 
The show will attended by an invited crowd on December 12, but is set to be broadcast in a four-hour Christmas special on Monday 27. Rosie Kendrick will be among the guest DJs on the night.
 
JAZZFM managing director Carter Tanner says, "This is going ...