Much UK military fabrication, 1950-55 was part-$ funded by MDAP (from 10/51, MSP), starting with US/UK/France co-ordination of priorities for strategic materials, and inc. supply of jigs & tools. US Technical teams were part of that, where Types were declared as Standard (so, $-Aeronavale Sea Venoms, 115 Hunters for new Luftwaffe, 346 Swifts for RAF/RBelg.AF/RNeth.AF (ah,well), NF Meteors for Belgium/Denmark/France). Gannet was one, inc. 16 Bundesmarine. Maybe p01’s envelopes were a US notion?