OLD MOBILE

Today I walked amongst a large holiday caravan park – getting ready for the Easter rush. There were some very expensive static caravans with up to five bedrooms.
Standing in splendid isolation was this one – what a trip back in time. It reminded me of caravans in the book Five Go Off in A Caravan by Enid Blyton.

I have searched the Interweb as to clues about this splendid home. The caravan has no obvious maker identification and the nearest I can get from an image search is the 1930’s.

Any other clues / ideas gratefully received as the whole thing amazes me.