These are taken from Assignment to Catastrophe Vol 1, Sir E Spears, 1954. Edward Spears was appointed by Churchill in 1940 to act to provide liaison between himself and the French High Command and speaks with first hand knowledge or quotes direct from source.
Initial RAF strength 6 fighter squadrons, 10 light bomber squadrons and 9 army cooperation squadrons. These totalled 96 fighters, 160 light bombers and 160 aircraft of other types.
These were reinforced after the German attack by 4 further fighter squadrons raising the total fighters based in France to 160.
A further 192 UK based fighters operated over France, using French airfields to refuel and rearm. Further numbers of UK based Bomber Command aircraft were involved. (392 - E.R. Hooton) In addition there were replacements for aircraft losses sent to the squadrons based in France.
RAF lost a total of 959 aircraft of which 477 were fighters. 1192 personnel were lost. These figures appear to cover both Phase I (the breakthrough in the north) and Phase II (advance from the Somme).
Approx numbers of each aircraft type based in France are:
( source:
http://france1940.free.fr/uk/raf_may.html )
Hawker Hurricane MkI 144
Gloster Gladiator MkII 16
Bristol Blenheim MkI 32
Bristol Blenheim MkIV 96
Fairey Battle 144
Westland Lysanders 80
de Havilland Dragon Rapide 16
Speaking at a meeting of the Supreme War Council in Paris on 31st May 1940 the French Premier, Paul Reynaud, stated that "he, his government, and his country were profoundly grateful for the magnificent support afforded to the French Armies by the RAF".