>>>It is established law that property left in, say, a dustbin, for collection is not without an owner any more, nor is it abandoned
True but the Theft Act 1968 states:
"A person’s appropriation of property belonging to another is not to be regarded as dishonest . . . if he appropriates the property in the belief that he would have the other’s consent if the other knew of the appropriation and the circumstances of it".
i.e. a person accused of theft has a statutory defence if, at the time of the alleged offence, he had a genuine belief that the owner of the property would not object to him taking it. (It is entirely irrelevant as to whether that belief was correctly founded or not). Any decent counsel should be able to argue that the defendants assumed that, by placing the food in a skip, Iceland staff had indicated that they had no further interest in it (unless, of course, there were signs displayed to the contrary). Remembering that it is not the job of defence counsel to prove innonence, but merely to show 'reasonable doubt', I can't see how the CPS decided that there was any realistic chance of obtaining convictions in this case.
Whle it might be argued that the defendants are charged under the Vagrancy Act, rather than the Theft Act (which, in itself, suggests that the CPS are struggling here), the Court would still need to determine wheher the actions of the defendants amounted to 'stealing' and, unless there are precedents which I'm unaware of, the definition of 'theft' laid down by Parliament in the 1968 Act is likely to be the one used by the Court.