 Evill also had to contend with temporary hangarage for his seaplanes and the safe operation of a crane which lowered his aircraft from the top of the cliff on to rails which ran into the sea.On 1 April 1918, when the RNAS was merged with the Royal Flying Corps, Evill was regraded from squadron commander to major in the new Royal Air Force.Evill remained in the fledgling RAF after the war and in 1919 he was placed in command of flying boat units, granted a permanent commission in the RAF in the rank of squadron leader and awarded the Air Force Cross.