[benj111]

Yes the crime of breaking and entering.

If I took a piece of potato peel out of your bin that was on the pavement, that might technically be a crime (I don't know). But are you going to pursue a civil suit? What compensation are you going to get?

Are the police or CPS going to prosecute? Is it in the national interest? Or are they wasting resources for no reason.

The BBC are in no way being harmed by someone who has permission to be on the premises taking something that the BBC literally believes to be rubbish.

There's a legal concept of irrationality. This would seem to be an example of that.