@boonie
An interesting question and coincidentally precisely what Steve and I discussed at length just a couple of days ago.
Sniper suggests researching the subject and rightly so because the subject matter is up there with other military achievements that are of great importance to the British people.
Meanwhile, I'll post a few links to help you along and leave you with the famous words of our leader after said events, in those troublesome days when Britain stood alone...“Never in the field of human conflict was so much owed by so many to so few.” ― Winston S. Churchill
https://en.wikipedia.org/wiki/Battle_of_Britain
http://www.bbc.co.uk/guides/zgs34j6
http://www.history.co.uk/study-topic...tle-of-britain
http://www.historylearningsite.co.uk...le-of-britain/