details given in AB Archive , both P.9/1 and P.9/2 were initially registered G-EAPD. Were they in fact the same aircraft,
was the registration applied twice or was it simply never carried by P.9/1 and reused on P.9/2 after the former was exported?
Alec Brew  states that "it was not the company policy to allocate c/ns and that when Long's
aircraft had to be registered in Australia after June 1921 it was retrospectively given c/n P.9.1 as it was the first built."
Archive 2002/1 (Air-Britain Publications)
Air Britain Archive 2002/2 (Air-Britain Publications)
Britain Archive 2002/4 (Air-Britain Publications)