Engines, sorry but I've no idea who ran the competition for the glider engineering contract that Serco eventually won. The timing though is important because that will determine which command, or group, had responsibility. HQ 22 Gp is only a recent organisation (of which the Air Cadets are part). Its predecessor was Personnel and Training Command, and before that, Supoort Command. However, at one time, the Air Cadets was a separate entity and the Commandant was actually an Air Officer Commanding in his own right. Similarly, Project Teams are a fairly recent (in the grand scheme of things) invention. What came before PTs?