I would guess that you haven't had him neutered. Males can be overly aggressive when they don't get to do what comes naturally. Not only will neutering calm him down significantly but will also make the odor of his urine less strong, he will be more likely to use a litter box and he'll be safe from reproductive cancers. When his hormones are no longer driving him crazy he will calm down and become more people oriented. Left unneutered he may begin to spray and start peeing on your clothes, shoes, etc, because he is so desperate for a mate. It is a kindness to have him neutered to relieve those frustrations. Besides there is a terrible problem with unwanted, homeless bunnies and they are being put down by shelters at an incredibly high rate.... I'm sure you wouldn't want him to accidently father a family and then have them killed when no one wants them.

However be advised you must have a rabbit specialist vet do the surgery. Most vets don't bother to take the training for exotics and buns are senstive to and have problems with anesthesia.

I also see you are in the UK.... There is a rabbit chatroom called the Tufty Forum and these people are incredibly nice and very knowledgable. You might want to check them out.
Good luck.