The radio on my drones record what you see and GPS map info. I don't need to get the drone back to see who hits it. As per the rules though they shouldn't be close enough for a hose in first place.
Some info here, although the actual rules are very in depth.
UK Dronecode explained: the law and no-fly zones - Feature - PC Advisor
For those who just want the basics-
Keep your drone within your line of sight and at a maximum height of 400ft (122m)
Always fly your drone well away from aircraft, helicopters, airports and airfields(expensive drones will not arm near airports and many congested places)
If fitted with a camera, a drone must be flown at least 50m away from a person, vehicle, building or structure not owned or controlled by the pilot.
Camera-equipped drones must not be flown within 150m of a congested area or large group of people, such as a sporting event or concert
This is current no fly zone register you can add yourself, no guarantee it will work though as the drone will need firmware update to block it, assuming the drone maker uses it.
https://a.tiles.mapbox.com/v4/noflyz.../53.452/-0.747
http://www.noflyzoneuk.org/no-fly-zone-map.html