The Alliance P.1 was a British single-engined training biplane re-designed by J.A.
Peters from the Ruffy-Baumann R.A.B.15 for the Alliance Aeroplane Company.
[1] The Alliance Aeroplane Company which had constructed aircraft under licence during the First World War decided to build aircraft for the civil market.
They took over the Ruffy, Arnell and Baumann Aviation Company and acquired the Ruffy-Baumann R.A.B.15 training biplane.
The R.A.B.15 had been built in 1918 and was powered by an 80 hp (60 kW) Renault piston engine.