▁mile ▁from ▁the ▁West on - super - M are ▁site . ▁ ▁This ▁was ▁followed ▁in ▁ 1 9 3 9 ▁by ▁the ▁establishment ▁of ▁No . ▁ 3 9 ▁Element ary ▁and ▁Reserve ▁F lying ▁Training ▁School ▁( ER FT S ) ▁at ▁the ▁air port , ▁using ▁Mil es ▁Mag ister s ▁and ▁the ▁Aud ax ▁and ▁H ind ▁variants ▁of ▁the ▁Haw ker ▁Hart . ▁ ▁In ▁September ▁ 1 9 3 9 , ▁the ▁No . ▁ 3 9 ▁ER FT S ▁was ▁dis band ed ▁and ▁replaced ▁by ▁the ▁No . ▁ 5 ▁Civil ▁Air ▁Navigation ▁School ▁( C AN S ); ▁both ▁were ▁run ▁by ▁the ▁Stra ight ▁Corporation , ▁until ▁the ▁R AF ▁took ▁it ▁over ▁and ▁renamed ▁it ▁No . ▁ 5 ▁Air ▁Ob ser vers ▁Navigation ▁School ▁and , ▁in ▁ 1 9 4 0 , ▁transferred ▁to ▁O ud t sh o orn , ▁South ▁Africa , ▁and ▁were ▁replaced ▁by ▁No . ▁ 1 0 ▁Element ary ▁and ▁Reserve ▁F lying ▁Training ▁School . ▁ ▁On ▁ 1 ▁May ▁ 1 9 4 0 , ▁the ▁R AF ▁formally ▁took ▁over ▁the ▁air field , ▁and ▁a ▁main ▁run way ▁of ▁ ▁was ▁laid , ▁with ▁shorter ▁run ways ▁of ▁ ▁and ▁ ▁on ▁the ▁grass . ▁ ▁On ▁the ▁west ▁of ▁the ▁air field ▁at ▁Old mix on , ▁a ▁factory ▁was ▁built ▁by ▁the ▁Ministry ▁of ▁A ircraft ▁Production ▁to ▁manufact ure ▁the ▁Br istol ▁Beau fig h ter