▁the ▁site ▁by ▁bus ▁and ▁train , ▁with ▁the ▁most ▁local ▁workers ▁arriv ing ▁on ▁foot ▁or ▁by ▁b icy cle . ▁ ▁During ▁its ▁existence , ▁the ▁factory ▁produced ▁finished ▁m un itions ▁including ▁bul lets , ▁shell s ▁and ▁mines . ▁Oper ational ▁for ▁just ▁over ▁four ▁years ▁until ▁the ▁end ▁of ▁World ▁War ▁II ▁in ▁ 1 9 4 5 , ▁by ▁which ▁point ▁it ▁had ▁produced ▁some ▁ 7 0 0 ▁million ▁bul lets ▁and ▁count less ▁other ▁m un itions . ▁The ▁factory ▁was ▁designated ▁as ▁a ▁' Top ▁Secret ' ▁installation ▁and ▁surrounded ▁by ▁high ▁f ences ▁with ▁bar bed ▁wire . ▁ ▁The ▁factory ▁was ▁visited ▁during ▁the ▁war ▁years ▁by ▁W inst on ▁Church ill ▁and ▁members ▁of ▁the ▁British ▁Royal ▁Family . ▁Many ▁well - known ▁entertain ers ▁of ▁the ▁day ▁also ▁performed ▁at ▁the ▁factory ▁for ▁the ▁workers . ▁ ▁Post - war ▁After ▁the ▁war , ▁the ▁factory ▁closed ▁and ▁the ▁site ▁was ▁turned ▁into ▁the ▁Newton ▁Ay cl iffe ▁Indust rial ▁Est ate ▁in ▁the ▁late ▁ 1 9 4 0 s . ▁Many ▁of ▁the ▁original ▁buildings ▁are ▁still ▁standing ▁today . ▁ ▁References ▁▁ ▁Newton ▁News , ▁Newton ▁Ay cl iffe ▁ ▁The ▁story ▁of ▁' The ▁Ang els ' ▁ ▁Great ▁Ay cl iffe ▁Town ▁Council ▁- ▁Town ▁History ▁Phot ograph s ▁and ▁brief ▁history ▁of ▁the ▁Ay cl iffe ▁Ang els ▁ ▁Ay cl iffe ▁Category : Build ings ▁and ▁structures ▁in ▁County ▁Dur ham ▁Category :