I suspect his hormones are driving him crazy and he just wants to mate with anything and everything....the quicker you get him neutered, the quicker that behavior will stop. Also you should know that when they do have their neuter operation, the hormones don't immediately disappear....it can take anywhere from 4-8 weeks for the remaining hormones to get our of his system, so he will continue for a short while to be aggressive after his neuter. You must be SURE to have a rabbit specialist vet as bunnies are very sensitive to anesthesia and it has to administered just ever so carefully. I bet if you posted this question on the Tufty Forum you may be able to get the name of a bunny vet there in Scotland........I did send you the web address, didn't I?

I feel the digging and nipping is the bunny's way of saying "I have had enough, put me down NOW"!!!!!!!! My buns do that occasionally to me, esp. Chocolate. I have a lot of little tiny holes in many of my shirts as well as an occasional little black and blue mark from the nips....... She has never really hurt me though, just surprised me.

Also, and maybe I said this to you before, I have found spayed and neutered dutch rabbits to be among the more affectionate and loving of bunny breeds (so are the New Zealands). They seem to be especially people-oriented and calm (esp. after their hormones are gone). We have had many dutch bunnies at our rabbit sanctuary and they have all been very delightful. Good luck!