 During 1936 the experimental system at Bawdsey was tested against a variety of simulated attacks , along with extensive development of interception theory carried out at RAF Biggin Hill . One observer was Hugh Dowding , initially as the director of research for the RAF , and later as the commander of RAF Fighter Command . Dowding noted that the CH stations provided so much information that operators had problems relaying it to the pilots , and the pilots had problems understanding it . He addressed this through the creation of what is today known as the Dowding system . 
