Thanks for your responses. We have not been told that Dan have TS although there does appear to be links to his tics. His noises are not words or anything that sound like words! but maybe this does not matter! (not sure really as specialist today was hopeless!.) Dan has stated that if he concentrates on breathing, he can control to some degree his noises, Also, when he has taken time out to just read and get his mind / brain active he has improved. This is why i mentioned that if he finds this helps, he needs to recognize that this will help him and put into action. When we explained this today, it was rubbished. Apparently we just found out that Dan and mum were being watched in the waiting room and were filmed before the consultant!
I will keep looking at this forum for some good advice on things we can put in place to help him, its so difficult for the other siblings at the moment as they find it quite disturbing. Hopefully he will 'grow' out of it sometime.