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xreime Glad you are enjoying the thread.
This photo was taken on 21st July 1951 and came with the following comment.
NV768 Hawker Tempest V. Napier test aircraft, with annular radiator and ducted spinner. Napier had a Flight Test unit at Luton, but the Sabre-powered Tempest was probably long retired.
A picture from the 'At Home' event organised by the Luton Flying Club on July 22nd 1951
Photo by the late Gerald Lawrence, digitised by Tony Clarke.