Some of the photos in the album have printed titles with location and even dates. Some have handwritten labels. This just had a number. It was clearly some sort of industrial facility in the dunes with a railway siding but nothing much else. The next album page had more pictures and provided clues – “Eskmeals” then “Eskmeals Explosive Stores”.
Google books: Search “Eskmeals explosives stores”
Coal Mining in Europe: A Study of Practices in Different …, Volumes 411-417
By George Samuel Rice, Irving Hartmann