What i meant was she will hop up on the sofa and sit next to me, purring away so i stroke her and she will love it, then all of a sudden out of the blue she will attack me, no warning or anything.

There have been no changes to the house at all, whilst i have had her here, i couldn't have another cat as she is enough, although i would love one but the partner will not let me ha ha.

Will definately try the water spray again though, thanks for the welcome and the advice