Do you know what this chassis fits?

I had an e-mail from a guy named Stuart, he said " I got it off an old bloke about 20 years ago . He had a car and this spare chassis in his loft . The car had been sold previous and I was told it was a Lanchester 12 . Obviously, I didn't see the car before it had been sold. "


So here are the pictures, Stuart is going to measure the chassis so we might have a better idea what it might fit. It looks like it had an off set engine.

I'm no expert (been told that many times) so come on all the real experts out there what does this fit?
The J type van in the previous posting, has been removed from e-bay. I'm told it got up to £2550, so will it soon re-appear as an ice cream van,  two e-bay J types this year have been Vandalised (pun intended) and good roof panels doors seats etc have just been thrown away when these much needed spares are wanted for other restoration projects.