[1][2] In 1925, AOC took over Aerofilms Ltd, and continued to employ Francis L. Wills as managing director of that company, that expanded its operations based at Hendon.

[1] In 1938, AOC purchased a Swiss-made Wild A5 Autograph photogrammetric plotting machine that could minimise the effects of optical distortion and perspective in magnified aerial photographs.

In early 1939, Sidney Cotton employed the facilities of AOC for production and interpretation of both vertical and oblique aerial photographs taken of ground installations in Germany and elsewhere in clandestine flight operations.

Formal training of many photographic interpreters (PIs) took place at Wembley, particularly of WAAF staff, including Constance Babington Smith.

However, its subsidiary Aerofilms continued as a named resource for aerial photographs, and its co-founder Francis Wills went on to become managing director of Hunting Aerosurveys.