Before the Second World War, the British aircraft manufacturer Saunders-Roe (often known as Saro) had initiated plans for transatlantic seaplanes.
Despite this failure, Saro was contacted by J. Dundas Meenan, consulting engineer from the firm Heenan, Winn & Steel,[1] on behalf of the Peninsular & Oriental (P & O) shipping company.
Saro proposed project P.192, a 670-ton seaplane powered by 24 Rolls-Royce RB.80 Conway jet engines with 18,500 lb (8,400 kg) of thrust each.
The route between London and Sydney had already been planned, via Cairo, Karachi, Calcutta, Singapore and Darwin (Australia).
The fuselage would have had 5 decks with passengers divided into 6 person compartments with seats that could convert into berths for the night, in a similar fashion to railway carriages.