Unless I have missed an earlier appearance (if I have please tell me, here), Lord Holford's 'outstandingly well-conceived precinct' (Pevsner) makes an impressive début as screen location in Darling (1965):
It appears again (I think) the same year in Life at the Top:
And four years later in Crossplot:
But the film in which it is seen to best effect is Herostratus (1968), with views of the main plaza and the principal tower, outside and in, from above and below:
The roof is again a location in The Rise and Rise of Michael Rimmer (1970):
Holford's Paternoster Square has since been remodelled out of existence by cartoon architects; these films are the archive of its image.
Darling is the archive of another object's image. There is a sculptural group in the square about which I can find no information. I don't know whether it was placed there for the film or was there already as part of the space's design. I don't know who made it, or where it is now:
Any suggestions here, please.