Cheers for the advice guys!!
Pepper spray has been put in a drawer - ill take it off her next time i see her!! didn't realise it was that serious. Bought her Trident thing instead - has an alarm and sprays an ultraviolet dye and smells awful apparently!
Re police..yep.. they have a note against her address. They call her each evening to check how things are going.
Windows have just been replaced and are all double glazed - but thanks for the advice on that!!
Shame someone gets hassled for no reason or fault of their own