Nice article about the area: https://www.bbc.co.uk/news/magazine-32758042 https://www.bbc.co.uk/news/magazine-32758042 I do also recall an episode of their TV

Nice article about the area: https://www.bbc.co.uk/news/magazine-32758042 https://www.bbc.co.uk/news/magazine-32758042 I do also recall an episode of their TV show Click (technology based news show) that covered some form of enforcement that saw a patrol that would monitor and locate (via triangulation) and radio interference - be that leaky microwaves etc. [EDIT ADD] I think I found the episode of Click in question, though it appear unavailable https://www.bbc.co.uk/programmes/b08450vk https://www.bbc.co.uk/programmes/b08450vk