Definition: Generate a correct and concise answer for the question based on the words in the context.
Input: Context : Sir Barrie Heath, DFC, AE (11 September 1916 -- 22 February 1988) was a World War II Royal Air Force Spitfire pilot who fought in the Battle of Britain, and was awarded the Distinguished Flying Cross. 
Question : What military branch is Barrie Heath?
Output:
Royal Air Force