There was a man called Jimmie Airlie who had an ice-cream shop in our town in the 50s and 60s. On summer Sundays the shop was closed, but Jimmy would ride his 3-wheeled bike around the town, blowing a whistle when he stopped. (Much better than the present kiddie-attractors!). He sold that ice-cream with ice in it which gave you a headache on a hot day, but had a flavour totally lost now. All he sold was ice-cream.