Thank you for the advice, I've only just seen it. I'm not going to try getting them back together, the lady I spoke to at the RSPCA didn't think there was much chance of them being friends again. They've had 2 big fights now and when I put them back together after the last fight, they were both very territorial and aggressive towards each other. Even little Oreo was looking aggressive.
I've racked my brains on what I can do. They're both indoor rabbits but I have managed to cobble two pens which are next to each other and they're living quite happily next to each other. Well at least they're not lunging at each other anymore. I've just taken these photos of them so you can see the set up.
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