I can listen to Broadcast radio, CB radio, Amateur radio, and PMR466, and if I by accident receive any PMR radio transmission be it fire, police, ambulance, or other, that is OK as long as I don't act on what I hear, unless reporting to the proper authorities, so if I hear some one planning a bank raid I can tell police, but to set up a video camera to record the raid would be against the law.
Also there are rules on using any radio which can be listened into, there was a taxi firm using CB radios, and thieves were using the information to know when homes were empty, one needs to be very careful.
I do maybe worry too much, as don't want to loose my licence, to may be listen in to my local railway PMR radio repeater and even tell some one else the frequency is one thing, but to publish in on a forum is some thing else.