Oooh Lookie! Some fantastic video interviews with Jonny Geller (literary agent with Curtis Brown Literary Agency). Very, very informative.
p.s. He turned down Adele Parks and sent her a rejection letter with some notes about where her novel fell down. She rewrote her novel and sent it back to him six months later. And he liked it - and signed her. (Think I'm going to I watch that particular clip over and over again!)