Good on you for stepping in. It is a shame that some of the kittens didnt survive, but if you hadn't been able to get her to the vets when you did, she wouldn't be here either, so you really did do a wonderful thing. Now she is spayed, she wont have to go through that again, and she might turn into a nicer natured cat. I am glad you have managed to get her in. You could check the Cat77 website (sorry, can never remember the address) as they have a few branches around the UK, but I don't know whereabouts REading is.