Hi Jade
Your reply was not harsh at all-it has already been going through my mind about having him put to sleep if he starts really suffering, regular teeth filings etc. He has had anesthetic before and come out fine, the other rabbits i had went to a load of different vets and also survived anaesthetic for other things but when it came to teeth filing-they all died of shock afterwards. Not something i want to put this rabbit through

He has been such a good pet that it breaks my heart to see him suffer

I will do all i can for him, but he will become even more miserable and aggressive with regular teeth filings for the rest of his life.
To answer your question-i have no clue what type of anaesthesia was used on my bunnies-never thought to ask.
I am going to get him a breeze block he can chew on, grind his teeth on and some applewood. I will take care of him but having seen the deterioration already i'm doubtful as to how much recovery he can make:'(