Notes : 1 . No . s 504 to 616 Sqns had either fighter or light bomber roles . Of these , No . s 501 , 504 , 600 , 601 , 602 , 603 , 604 , 605 , 607 , 609 , 610 , 611 , 615 and 616 Sqns flew in the Battle of Britain . Nos 620 , 623 and 624 Sqns were only established for service during World War 2 .
2 . 622 Sqn had – and still has – a transport role . The present day reformed 622 Sqn began life at RAF Lyneham in 1994 as 1359 Flight which provided reservist aircrew for the Hercules Force . It moved to RAF Brize Norton in 2012 where it took on the former 622 Sqn identity .
3 . No . s 661 to 666 Sqns had air observation post roles where the aircraft were flown by the army but were maintained by the RAuxAF .