Aircraft naming.
It was indeed the practice of squadrons to name individual frames before centralised servicing. Britannias were named after constellations (envy?) and the Belfasts and Akrotiri hercs were named after Greek heroes and somesuch. A quaintly British notion.
What used to get my goat is having to arrive at a particularly "warry" base full of dust and flies with the slogan emblazoned along the side. "This aircraft has been adopted by the Mrs Miggins raffia class of Toothill Primary School."
Fortunately that embarrassment went with a change of C.R.O. Cuddly Hercs we were not!