Another one of the biggest barriers the Poles had to face was that of language. The fact that the majority of the Poles could not speak English made them unreliable in battle in the eyes of British commanders. One of the commanders stated that he would not have "people crashing around the sky until they understand what they're told to do." The Poles had to go through English language training before the majority of them could see action. On 11 June 1940, the Polish government-in-exile signed an agreement with the British Government to form a Polish Air Force in Great Britain. Finally, in July 1940, the RAF announced that it would form two Polish fighter squadrons: No. 302 Squadron and No. 303 Squadron were composed of Polish pilots and ground crews, although their flight commanders and commanding officers were British. The two fighter squadrons went into action in August, with 89 Polish pilots. Another 50 Poles took part in the battle, in RAF squadrons.