As Mechta Senior worked for MOD (PE) in St Giles Court for many years, I tried to locate a picture of the place on the net. All I could find was a plan of the place and this quote:
"The building was constructed in the early 1950's and contributes little to the public realm."
https://www.google.co.uk/url?sa=t&rc...MLm6nA&cad=rja
Presumably the enforced ban on cameras in MOD buildings in those days has a lot to do with the lack of photos.
I did find a picture here in post #5.
St Giles Court | West End | 49m | 15 fl - SkyscraperCity
Wikipedia describes the area thus:
The grim appearance of St Giles Court contributed to the area becoming a magnet for prostitutes and the homeless.
To my mind, a rather harsh description of MOD(PE) civil servants, but I didn't work there...