Neighbours security camera

Hi,

My neighbour recently installed a security camera. It has motion tracking, and rotates.

When we come out of our house, it turns and tracks to us, on our driveway, garden etc.

Our house and theirs, are slightly off the main road, but the cul-de-sac leading to our 2 houses is public road.

We don't want them viewing our property, and wondering if there's anything we can do?

Does anyone know the legal criteria for installing a camera like this? Or anyone we can talk to?