Unfortunately things really aren't going well so I don't know whether to give up. I managed to do some more smooching with them but a few days ago, I allowed them next to each other briefly and they just went round and round each other fighting, fur flying. I couldn't stop them, eventually I managed to. I separated them with the mesh but stayed outside for longer to allow it to end on a nicer note. They were both unhappy and mirrored each other up and down the divide for a bit then went off and did some munching. The next time they both approached the barrier, Hazel put her head sideways towards him as I stroked her, like she wanted to smooch with him again. He was not interested but didn't do anything. I did manage one time to lift the barrier about 1/2 an inch and they both had their heads down while I stoked them nose to nose. Back indoors they were fine through their mesh between their spaces. But the next day as soon as I got them outside, they went up to the barrier, Hazel sniffing as they both usually do, but he lunged for her (couldn't get her because of the mesh), I stroked them for a second. About 10 seconds later hazel went sniffing again and he put his tail up and lunged again, kicking his front feet at her. I stroked his head firmly and he relaxed. She went off munching so he then did the same. A bit later they were both sniffing each other so I stroked them both, lifted the barrier and we had another smooch for about 10 minutes. Unfortunately someone came to the door (the garden is enclosed but it is our access in and out the house), so we had to stop. Shadow ran round me so fast I didn't have time to stop him and they got to each other, they sniffed each others side and I decided not to stop them but then they went crazy round each other again so I separated them. After that they were both still acting aggressively/defensively. Again back inside they seem fine between their rooms. I got some advice from someone who does bonding to try putting them in a small neutral space and just let them be together, only to intervene if they are like a tornado. I was a bit concerned as Shadow does seem to have started to be aggressive since their first fight. But I tried it, water sprayer in hand! We put them both in and they started sniffing each others sides for about 5 seconds but then they started a wild round each other, and in a ball kind of a fight. I sprayed and sprayed them but no effect, we waited it out as instructed but it was too wild and Shadow was pinning hazel onto her back and had hold of her stomach. My partner picked him up and he still had hold of her, I was so scared she was going to get her stomach torn. Luckily he must have had hold of the weird massive clump of fur that is on her underneath where she was speyed, she is bald all around it! So she had no wounds there, they both had the odd small wound but nothing major, phew! We stroked one bunny each and calmed them down, we made the area bigger again, put them together with the barrier inbetween and I spent some more time with them (in the rain!). They did calm down and clean themselves and do some more munching. When I took them back in they seemed ok-ish. I didn't swap their rooms then as I thought they were stressed enough already. A few people have mentioned the putting them in a cage in the car option but I am so reluctant to do this, I am so worried that if I put them in, with the aggression that has been showing, they might not be stressed enough to end up cuddling and they might end up fighting like mad again and I wouldn't be able to stop them if they were in a cage. I wanted to give up but today I tried again back to just letting them be outside next to each other. Shadow was aggressive at the mesh to hazel. But then he kept pushing his head right to the mesh so his nose was poking through a bit, when she touched his nose he jumped back and did an attack move with his feet but them did the same again. I stroked them both either side and it seemed like they wanted to be near each other, Hazel in a more relaxed way, shadow in a very firm, pushy way, you can't push him away easily when he is like that, he is determined and his intentions aren't clear. When we came back in I swapped them over rooms. Shadow now has hazels room and the hallway and she has his room. He is loving it, both their rooms are good sizes but the hallway is big too so he has been running like crazy up and down, winding hazel up! She isn't too happy, at their gate she has been more intent, keep going back to it but I think she is better than I thought she would be about it. When they are both at the gate she is sniffing and mirroring him a little bit but not biting at it or scrabbling at it like she did when we first got him. I have asked a few local places if they have anyone who can come and help or me take them to their place but no one knows anyone with experience. I did speak to a lady earlier who used to do it in this area but she is getting old now and said she hasn't done it in years and didn't think she would be able to do any more than I am. She said it didn't sound good with the aggression and maybe it wasn't going to be a good match. If I could see further down the line that this was going to work, then I would 100% carry on no matter what. Hazel really seems like she would love to be cuddling up to him and she definielty enjoys the smooches with him. But he still has something to work out but I can't let them get past it when it's getting so aggressive that could cause serious injury. I am trying the swapping over and going to continue outside but with the barrier and see if it calms shadow down at all. I don't want to continue for too much longer though as Hazel is getting so stressed with all these different things. Shadow seems to take things in his stride but I don't want to accidently turn him into an aggressive bunny or something!