Try iPlayer for a programmme with David Jason from BBC2 last night. Only saw a few minutes but they were talking about old home kit built planes that they were restoring. Could be something like that.
It looks like a very rustic home built a/c with rotted wooden frame and doped wings and a few basic instruments. I imagine it’s been subsequently converted as an engine for some non-flying purpose (you wouldn’t go flying with that huge rectangular radiator in the pilot’s field of view, at least I wouldn’t)