Da farko an ɗauke ta aiki a Sashen Landan don bincika sassan sirri na "The Times" don sakonnin leken asiri da aka ɓoye. Sa'an nan, a 1940, an tattara ta don aiki a matsayin mai ɓoyewa a Bletchley Park. Ta yi aiki a matsayin mataimaki ga Dilly Knox, kuma ya kasance a hankali da hannu a cikin decryption kokarin kafin
Yaƙin Matapan. A cewar "The Daily Telegraph", ta zama ta saba da salon 'yan ta'adda na abokan gaba cewa ta iya sanin cewa biyu daga cikinsu suna da budurwa mai suna Rosa. Batey ya kirkiro wata dabara mai nasara da za a iya amfani da ita a wasu wurare.