Philip J BirtlesPhilip Birtles started work at the de Havilland Aircraft Company in September 1957 as an engineering apprentice. Following completion of his training, he was appointed as John Cunningham's PA, the famous Second World War night fighter ace. During theremainder of his career in the aerospace industry, he had a number of marketing positions until taking early retirement when Hatfield Aerodrome finally closed at the end of 1993. He spent over forty years as a trustee of the de Havilland Aircraft Heritage Centre and has written over thirty-five books. Read More Read Less