As a slight aside and following the compo detour, as a 16/17 year old CCF cadet we went to camp at Lydd, but the grown-ups had forgotten to book the cooks. Selected by schoolmaster masquerading as Lt Col, from a cast of one ("You want to be a leader of men") so for a week, from a vast stock of compo boxes and some fresh bread and potatoes, and with a daily squad of helpers, I fed 150 cadets and officers. It was actually good fun, but absolutely knackering. So "compo" has a special place in my heart