6 year old won't sleep

[wotsit1999]

I am going to post this on a few boards for maximum coverage! My son turned 6 last week and for about 2 years now he takes hours to get to sleep. He does not get out of bed, he just lies there/rolls around and hats to himself for hours. I put him down at 8, he will drop off around 11. He is exhausted at school. I have tried everything I can think of, but please suggest anything I haven't!! So far tried:
Tiring him out
Changing his diet/less sugar
Baths/lavender
Warm milk
No TV
Bedtime story
Good routine
CDs with stories
Black out curtains
Kids hypnosis CD
Is there anything I am missing? I really do not know what to do anymore.

Blimey it really does seem you have tried everything!

Could he go up a bit earlier (say 7 pm? ) He may take just as long to fall asleep but it would be an hour earlier?

Is there anything similar to nytol for children? Can you ask your GP or pharmacist?

He used to go at 7, GP suggested later but other than that has been pretty useless and just keeps going on about routine... Good idea about the Nytol! I never know whether to just leave him there or keep checking on him, feel guilty knowing he's laying there restless for hours.