The Committee contacted Armstrong in May 1940. It was suggested that he might be on "stand-by" to take air raids as a subject, along with Graham Sutherland and Harry Morley. The fee was to be 50 guineas.
By the end of October that year, Armstrong had delivered three pictures: LD 486, 487 and 624. The original titles for the first two pictures are at (22). Armstrong mentions that these three pictures form a series called Debris and Demolition' (23) and also that he is working on a poster design for Kenneth Clark.
In connection with his next pictures, Armstrong went to Cowley to see the crashed German aircraft, and was also supplied with some photographs by "Moonstone". The resulting pictures were LD 914 and 915 (41), titles of which are at (45), purchased in March 1941.
In November 1942, a commission of a Production subject was suggested, at a price of 30 guineas (57). Armstrong mentioned that Kenneth Clark had already sent him a description of a glider factory (58). The picture, LD 2861, was delivered in April 1943. In the same month a further commission was given (IWM:ART LD 3359) for 30 guineas, and another in October, for "a cable factory" subject, although this appears to have been cancelled in December that year (83). Another was given in November 1943, for a picture of Morrison Shelter Experiments, originally for 25 guineas (76) but, after Armstrong complained, raised to 30 guineas. However, in a letter from December 1945, Armstrong writes "I could make nothing of the subject of my last commission" (87).
Much of the intervening papers remainder of the file relate to renewals of sketching permits.