When does property belong to someone?
Under section 5, property belongs to any person having possession or control of it or having in it any proprietary right or interest.
It is possible to steal your own property if it is under someone else's possession or control: TURNER
Under s.5 where property is handed over to D by V and there is a legal obligation on D to keep it or deal with it in a particular way, it is still considered as belonging to V.
Under s.5, where D recieves property by mistake and there is a legal obligation to give it back, then it still belongs to another