Thanks John, though I'm not convinced all Land Rovers used on the snowy were short wheelbase. I've certainly seen photos and videos that show long wheelbase series 1s on the project, though in what capacity they were used is unclear.

Whilst the circular logos on the doors hold one level of interest, the more photos I see of various vehicles on the scheme used by contractors I think the yellow that the vehicle was over-painted has some significance. It does seem to be the same shade of yellow used on contractors vehicles and I wonder that whilst the Electricity Commission may have been the first owners it may have had a subsequent use by others.

My curiosity continues, if anyone has access to documents that might hold the key.