We recently bought a house owned by a former engineer and have recently unearthed in (amongst engine parts for old cars) a petrol lawnmower and two grass collection boxes. There was a third one but it was too rusty to save.
As it is very rusty but has been undercover it may be salvageable - I don't have the know-how or time to do anything and would very much like it to go to someone who wants to restore it.
We are based in Oxford. If anyone can identify it or wants to take it one please let me know.