May I suggest that those interested in the Battle of Britain and the defence of Malta look up two excellent books; first, "The Most Dangerous Enemy" by Stephen Bungay & "Fortress Malta" by James Holland. Both are extremely fine reads and the "The Most Dangerous Enemy", especially, explodes quite a few myths.
The RAF were not quite as outnumbered as often supposed; if one includes all aircraft the numbers were only slightly in favour of the Germans and much more importantly, the RAF had the bigger reserve - the Luftwaffe were forced to use almost all their strength up front, whereas the RAF were able to keep feeding in replacements. Granted, the replacements were not very expereinced and all too often fell victim to the Luftwaffe experten, but all the RAF had to do was last long enough for the weather to become bad enough to make an invasion impossible.
Additionally, the Germans pretty much did not have much idea of how to go about conquering a country entirely by air - not surprisingly, as no-one else had ever done it either. The RAF were in a similar boat, no-one having tried to defend a country entirely by air before, but on the other hand, they had directed a great deal of thought about it ( much more than the Germans had given to invading Great Britain ) and crucially, the two men in the most important posts - Hugh Dowding, C-in-C Fighter Command, and Air ViceMarshal Keith park, in command of the vital 11 Group area, probably knew more about fighter defence than anyone else on Earth at the time.
( Keith Park, in fact, not only stopped the Luftwaffe over England, he then did it again when placed in charge of the Malta air defence later in the war. One of his first questions, upon being told Malta was the most bombed place on the planet, was "Why don't you stop the bombing?". He did just that - in three weeks ).