The R27 was captained by Acting Major Patrick Graem Nelson Ommanney.
Patrick was son of the highly-regarded RN Rear Admiral, Sir Robert Nelson Ommanney.
Patrick Ommanney was granted a patent on 5 May 1920 for an “instrument for facilitating calculations depending on the relations between the pressures, densities, temperatures and percentage compositions of gases, and the recording of observations of these quantities.” It then looks like Patrick spends most of the 1920s travelling back and forth to the USA, as first a journalist and then as a merchant (possibly for tea and coffee).
Thanks to Peter Art Lewry and Eddie Taylor for this information.