Where is this?

The construction, to me, seems purpose built to resemble the bridge of a ship.The covered signalling lamp and what appears to be a triangular 'pennant' flying from the mast still suggests a maritime signals training establishment.

IIs that a semaphore mast to the right of the lamp?

IWM image, an Australian ship, but would seem to have similarities.

John wrote:

On the RN Research Archive.

It looks very similar to the Royal Navy Shore Signal Station at Dungeness:

Another website dates that Dungeness RNSSS image as 1942.

theromneymarsh.net/dungenessbuildings

Peter wrote:

In that case the barren land makes sense. You can also see the cable stays for the second flagstaff in the original post's picture.

How did you link the two?

Gut feeling from the landscape.

Thanks Paul that has nailed it.

In the original picture in the far back ground you can just about make out a single storey building with something like a telegraph pole coming from it ,In the picture Dungeness lighthouse and signal station between the station and the building next to the pylon one can see a single storey building with what looks like a telegraph pole emerging from it if one compares the angles of the photographs a camera positioned to take the first photograph and include that building would appear not to include most of the details on the Dungeness photograph . In short there would appear nothing in either photo to stop them being of the same signal building albeit possibly at different dates