▁your ▁ticket ▁- ▁Using ▁( or ▁mis using ) ▁the ▁system ▁to ▁effect ▁an ▁early ▁dis charge ▁from ▁the ▁R AF ▁on ▁administrative , ▁comp ass ion ate , ▁or ▁medical ▁grounds . Work s ▁and ▁Br icks ▁- ▁Air ▁Ministry ▁Ministry ▁of ▁Works ▁department , ▁responsible ▁for ▁air field ▁construction ▁and ▁infrastr ucture . ▁Post ▁war ▁became ▁the ▁MP B W ▁- ▁The ▁Ministry ▁of ▁Public ▁Build ings ▁and ▁Works , ▁later ▁taken ▁care ▁of ▁by ▁the ▁DO E . W rap ▁up ▁- ▁Cr ash . W X ▁- ▁We ather . ▁ ▁Y Y ▁service ▁- ▁Sign als ▁monitoring ▁oper atives ▁who ▁speak ▁the ▁enemy ▁languages . Y ank ing ▁& ▁Bank ing ▁- ▁Perform ing ▁aircraft ▁man oe uv res ▁to ▁avoid ▁being ▁shot ▁down ▁by ▁the ▁enemy . Y ellow ▁d ough nut ▁- ▁Un col lapsed ▁air - se a ▁rescue ▁d ing y . Y ellow ▁per il ▁- ▁Training ▁aircraft ▁( us ually ▁yellow ). Y ing ▁Yang ▁- ▁Very ▁much ▁all ▁over ▁the ▁place ▁in ▁a ▁mess ▁- ▁at ▁six es ▁and ▁se vens . ▁▁ ▁Z ▁ ▁Zob it ▁- ▁An ▁Officer . ▁Z ulu ▁- ▁Green wich ▁Mean ▁Time ▁( 2 5 ▁of ▁ 2 4 ▁hour ▁clock ). ▁ ▁A ircraft ▁Nick names ▁ ▁Many ▁aircraft ▁were ▁known ▁by ▁dimin ut ives ▁e . g . ▁" Sp it " ▁for ▁Sp it fire , ▁" L anc " ▁for ▁Lanc aster . ▁In ▁addition ▁Al lied ▁air ▁forces ▁may ▁have