If you've got transport then Dolphin Surf School in Newquay is excellent...
Friendly staff, good coaching and a much better instructor / student ratio than some of the other schools (particulalrly in the morning)... The hungover newbies tend to pitch up in the afternoon!
They also try to find some half decent waves, relatively uncluttered beaches (a rarity in the summer) and don't teach or charge you if it's pancake conditions...
They live at
www.surfschool.co.uk
Oh don't froget to pray for some ripples, it's been utter pants recently...