Home CCTV and neighbour complaint - England

Hi

I have some cctv on my property, mainly pointing on my front garden and front door.

My neighbour and I share a ramp leading to our property, and she has been moaning because flashes as she walks past it (motion detection). and she's saying she's going to report me.

As far as i understand, I'm not breaking the law, but I don't know all the ins and outs / responsibilities.

Anything I should be aware of? And can she actually do anything about it, simple because she doesn't like it?

Thanks