P.1072 Armstrong Siddeley Snarler ASSn.1 (Chapter: The Quest for Power...). In: Flight. 6. August 1954, S.444 (flightglobal.com [PDF]): „Transferring liquid oxygen from a B.O.C. spherical tanker to the Hawker P.1072 in which the Sn rocket was tested. The gas is exhausting through the lower vents and rapidly evaporating.“