'If you can't make people have fun at Glastonbury you should go home,' he says
New dates point towards possible Glastonbury appearence
Acts will join Kings Of Leon and Kasbian at the event
Plus NME/Radio 1 Stage headliners revealed
'Kings & Queens' man also promises a busy 2010
Londoner beats Lady Gaga and Florence And The Machine to award
'Maybe it's time to stop writing for a bit' says Jamie
Extra O2 Academy Brixton show added to dates
Singer needs more time to recover from laryngitis