This turned out not to be the best setup, as it allowed the two of them to set up territories to guard. 
Prior to putting them in the run we put them both in the carry cage and took them for a walk around the block to kick start the process. As you can probably tell by the pile of white fluff in the picture, initially there was quite a bit of fighting. Bramble seemed to be the aggressor in most of it, and a lot of time was spent pulling them apart when they started fighting. Fortunately although Bramble kept attacking Flop, it was only to establish dominance, and so although there was a lot of fur being pulled out there weren't any serious bites. There was a lot of boxing as well, and after a while Bramble saw my gloved hand as a threat and started trying to attack that after Flop had been moved to safety! N.B. Rabbits have very powerful jaws and teeth - it was only because I was wearing two thick pairs of gardening gloves that she didn't draw blood, but I still got bruises!
We eventually took everything out of the run apart from the hay, the willow toys and the water bowls so there was nothing for them to seek ownership of. The internet was a constant source of reassurance, possibly one of the most helpful sites explained that unfortunately not all rabbits speak rabbit. Flop has always lived with other rabbits until his brother died in September, and so still remembers how to share things and what rabbit body language means. Bramble has lived alone for most of her life and so being faced with a larger rabbit when she doesn't understand what he's saying to her was very scary. After a few hours though I didn't have to intervene in any fights, and whilst they were still doing a lot of chasing and fur pulling they had stopped boxing.
After six hours or so we put them both in the bath to encourage them to get closer to each other, 
Bramble kept shoving her head under Flop requesting him to groom her, but he wasn't having any of it! I ate my tea at the desk next to them that night as I didn't feel that they could be left unsupervised. I didn't get much sleep overnight either. I left the desk lamp on all night so at the first sound of a scuffle I could see if I needed to intervene. By the morning they were calmer, therre was less fur pulling, but lots more chasing, sometimes five or six circuits of the run before Bramble would leave Flop alone. Flop also took to stomping whenever Bramble came near him. They sort of developed a truce where they would relax in opposite corners to recover.
To be continued.....
Well, technically it wasn't the first time we'd met, but this week the two foots decided we ought to get to know each other a bit. They did this by sitting next to each other and one of them held each of us so that we could have a sniff about. I was quite well behaved I thought, although they said that nicking the broccoli from in front of Bramble's nose wasn't very gentlemanly, but it was yummy!
