“The [Maunsell Towers] Thames Estuary Army Forts were constructed in 1942 to a design by Guy Maunsell, following the successful construction and deployment of the Naval Sea Forts. Their purpose was to provide anti-aircraft fire within the Thames Estuary area. Each fort consisted of a group of seven towers with a walkway connecting them all to the central control tower.” Constant’s Babylon meets the economic mobilization of WWII. These look like a cross between the Empire’s attack-convoy robot-walker things in *The Empire Strikes Back* and, yes, Constant’s Babylon:
As such, these are dying to be used in a film.
Another site verges on the illiterate, but it’s clearly enthusiastic, and explains the towers’ construction.