That felt a bit of a fluke! I didn't have time earlier to go looking through the Francis Frith photos, so thanks for finding that. All the ones I came up with seemed to have a different roof line on the main block of buildings in the middle.
Note the similar shadows, wind in the opposite direction, and another eclectic collection of flags.
Since the Friths photo is about 1950, it might be possible to pin Martin's down a bit more precisely if we knew when the block of flats at the top was built (there's something different on Friths').