Simplify the following text for a Grade 7 native English-speaking person.
Original: This was the ` Dowding System ' , after its chief architect , Air Chief Marshal Sir Hugh Dowding , the leader of RAF Fighter Command .
Simplified: This was the `` Dowding System '' , after its chief architect , Air Chief Marshal Sir H.C.T. `` Stuffy '' Dowding , and the leader of RAF Fighter Command .