To follow on from LtS's earlier contribution, at my school (which shall be nameless!), jam roly poly was often referred to as "Dr White's Pudding". Nuff said!

"Say what you will, school dinners make you ill
Davy Crockett died of shepherds pie
Lumpy custard, yellow mustard
Dead dog's eye."

(I've often wondered whether that last bit inspired the similar lines in the Beatles "I am the Walrus")

Come to think about it, that little doggerel is as dating as a bristle cone pine!

Alan