Ok not by being physical but just chasing him off with a water pistol or shooing him away.
I am not being arsy about that, by the way but wondering if IBU to offer to buy her some cat repellants or something? OH thinks we should leave it and thinks she's just mean lol.
We have only recently moved to this area, have never spoken to her. We said hello a few times, she's not interested, fair enough. We've also put a note through before when we had work done to the house to apologise for the noise (she's quite old, I would say 70+) so I atleast hope she knows we're not mean people.
We can't keep the cat in as he was a stray so used to outdoors and goes crazy if hes kept in. I have tried shouting him when he goes over the fence, but, well he's a cat 
I dont like it as he's my baby of course, but if she doesn't like cats or whatever and aslong as he's not hurt I can't exactly say anything.
I'm not really sure whether to just let it be and let her chase him off? I'm just worried he might piss her off enough to start chucking stones at him or something.
She's obviously not fussed about us being 'neighbourly' so I dont know if it would be overstepping to go and offer her some cat repellents or similar (open to suggestions on something 'similar' btw)