German bombing in 1940 and 1941 made a large hole in the map of the City of London:
Richard Widmark is, I think, running across that empty space in this scene from Night and the City (1950):
From 1957 on, the London Wall development begin to fill that hole, and by the mid-60s the array of tower blocks and walkways each side of the street called London Wall had become a familiar feature of the cityscape:
London Wall began to appear regularly in films around 1963. Below are images from ten films through the decade that used the location, beginning with Ladies Who Do (1963):
Followed by That Kind of Girl (1963):
Catch Us If You Can (1965):
Life at the Top (1965):
Three Hats For Lisa (1966):
The Sandwich Man (1966):
Blowup (1966):
Sebastian (1968):
Crossplot (1969)
And The Rise and Rise of Michael Rimmer (1970):
For details on the London Wall development see this page from the Blowup Then and Now site.
