Hi mikey, thanks for your response.
I hadn’t actually considered that they might not be bonded as they seem so happy together. The bonding process we went down was them living in side by side pens for about 3 weeks, swapping toilets, food etc to help with scents. After Sky was spayed we then tried so stress bonding which was the major success. After a couple of days of this they were spending time together in Storm’s territory with no problems, and a week or so later they started living together. We haven’t had any fights and they spend a lot of time grooming each other and snuggling together.
Regarding the mounting, it’s the first time we have ever seen any of this from them, we went to separate them but Sky moved away each time he tried it. She doesn’t seem to have taken any offence, they still seem ok together, but he does seem unhappier today.
It is just starting to be spring and nice weather here.
Any advice you may be able to give would be much appreciated, everything I have read seems to refer to pre-neutered rabbits, or aggression from the start, neither of which apply to us.