Thought I'd update!

The medication was singulair and I don't think it did much at all, unfortunately.

The full results of the study show that his brain is waking 4.3 times a night on average and they believe it is related to the tonsils or adenoids after all, so now we have to go back to the ENT and discuss it further :/

~ H ~ I did bring up the possibility of it being caused by an allergy (and used your example) and the respiratory paed didn't seem to give it much consideration. I'll discuss it with the ENT when we go to see him in a couple of weeks time and see what he says.