Platt was given special facilities by the Admiralty for coastal subjects. In August 1942 a picture was purchased for 45 guineas (LD 2302) (7); in September 1942, IWM:ART LD 2416 was purchased for the same fee (10). Platt then proposed a scheme for Thames subject pictures, and asked for facilities including for photography. In December a picture was commissioned for 45 guineas (?LD 2831). This was to be worked up from one of a series of "small scale roughs" (listed at (24), with the final numbers - IWM:ART LD 2638-2643) for 30 guineas. Biographical details are at (31).
Platt was then particularly working as official artist to the Ministry of War Transport. At (50-51) are descriptions for IWM:ART LD 3827 and IWM:ART LD 3530. In June 1944 a war supplies picture was commissioned for 50 guineas (56). There is then lengthy correspondence about Platt's attempts to get a new pair of binoculars for use in his work, watching vessels on the Thames from his studio.
Post-war correspondence with the IWM concerns reproductions.