> Under Section 5(1)(b) of the WT Act 1949 it is an offence if a person "otherwise than under the authority of a designated person, either:(i) uses any wireless

> Under Section 5(1)(b) of the WT Act 1949 it is an offence if a person "otherwise than under the authority of a designated person, either:(i) uses any wireless telegraphy apparatus with intent to obtain information as to the contents, sender or addressee of any message whether sent by means of wireless telegraphy or not, of which neither the person using the apparatus nor a person on whose behalf he is acting is an intended recipient; So yes, use of radio receivers to listen to anything in the UK, other than general broadcast or frequencies you're specifically licenced to listen to is an offence without express permission. I believe it's the main reason you can't stream Air Traffic Control frequencies in the UK, where as their available for other countries. More information available here: http://www.monitoringtimes.com/html/mtlaws_may04.html http://www.monitoringtimes.com/html/mtlaws_may04.html