Yes Sir you are correct it is indeed a Jennings,
It is a 1970 model all original apart from a couple of cupboard door handles and 1 internal 12 Volt light fitting.
Very nice van. Good luck with finding an original light fitting it took me ages to get one - rare as hens teeth sunk into a pile of rocking horse poo:I
Nice looking van Jim and as for the parts, well you're within a stone throw of Panky so one dark night. You can always pretend to be doing trick or treat.[V]