That is certainly 0 gauge John, lovely photo. To me there are a couple of possibilities, 1) Harold was exhibiting his portable layout in Blackpool, but, with the ballast and scenery etc it seems unlikely. I only remember the unballasted ones at shows. 2) He had a more "permanent" layout in Blackpool before moving to Scarborough.
The layout depicted above does not give me any indication as the one in Scarborough. I believe he did venture out often in the closed season but I would think Blackpool was "shut" if Scarborough was.
I think Victoria is about my age and she never said they lived in Blackpool so it may have been before her time, I can only remember him with a permanent layout from Scarborough but the Dublo layout I remember well from both Blackpool Olympia and then in Harold's possession in Scarborough.
It is intriguing to say the least as there is very little information about Harold Elliot and his layouts.
Here is a scan from Michael Fosters book showing a Dublo layout from 1953 (I was 1) and is very similar to the one I remember although by the time I saw it the Castle and Bo-Bo were running. I think I will have first seen it around 1957/8 time. By the time I did see it the layout had acquired the turntable as well. I will say that at both Blackpool and Scarborough the layout was only viewed from the far side and not from where the photo was taken.