https://en.wikipedia.org/wiki/Lockheed_P-38_Lightning
Model 322 / 3 delivered / RAF order: twin right-hand props and no turbo
Wilson, S, 1996, Zero, Hurricane & P38, Aerospace Publications, Canberra
Lightning 1 (RAF designation)
667 ordered (417 for the French, 250 for RAF) but cancelled after the 3 delivered for evaluation
The 140 already built were transferred to the USAAF as fighter trainers & for defence on the West Coast (and retained RAF serials during their service career)