briantrumpet
Timewaster
Attaching things to street furniture / lights without permission of the local highway authority is already illegal under S132 of The Highways Act though so I assume the injunction has been made on that basis.
Actually, interestingly, this is not so. "The Order does not refer to any particular legislation (for example highways legislation) under which the Order is made, and so it may be presumed that it is under the general jurisdiction of the High Court." (David Allen Green)
David Allen Green wrote a good summary, and of why he considered this to be a very sound case.
https://emptycity.substack.com/p/how-a-county-council-has-obtained