Imperial Airways Short L.17 'Scylla'

Imperial Airways Short L.17 'Scylla' was a British 4-engined
39-seat biplane luxury airliner designed and built by Short Brothers
at the request of Imperial Airways to supplement the Handley Page
H.P.42 fleet already in service after Handley Page quoted an
excessive price for the aircraft. The Scylla was used for scheduled
flights between London and various European cities such as Paris.