You're stood in the corner shop with a handful of coins, staring up at a wall of glass jars. The shopkeeper's waiting. You say the words every child in Britain knew by heart. "A quarter of those, please." Spanish Gold. Lucky Bags. Pacers. Spangles. Texan Bars. Most of the sweets that sat on those shelves are gone now. And if you grew up in British corner shops during the 1960s, 1970s, and 1980s, every single one will take you straight back.