The Short L.17 Scylla was a British four-engined 39-seat biplane 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 two additional H.P.42s.Imperial Airways used the Scylla for scheduled flights from London to Paris and other European cities. Two aircraft were built, Scylla (G-ACJJ) and Syrinx (G-ACJK).