In article ,
"nightjar" nightjar@insert my surname here.uk.com wrote:

at least 2.5m above ground level. Anything that is at least 2.5m above
ground level will be illegal if designed or intended to act as a trap.

Ah, so fish ponds and plants with spikes are illegal.

If intended as a trap, they would be. A purely decorative wall covering of
Albertine rose would not.

Colin Bignell

A fish pond intended as a trap...?! Who's your neighbour - Ernst Stavro
Blofeld?

To the original poster - Have you contacted the Anti-Social Behaviour
unit of your local council? Some of them have a proactive attitude and,
if enough people complain often enough, something may get done. It's
also worth finding out if you have a community constable who might be
collecting evidence on the local troublemakers. Again, if they collect
enough complaints, it sometimes forces action.