They are abundant and come in countless shapes and sizes, from tiny Mirabelles, little bigger than a cherry, to the perfumed, green golfball-size Reine Claude, pointy purple plums (similar to Victoria plums), and round, shiny aubergine-coloured red plums. Buying a bag at the market is easy and cheap — resisting the urge to guzzle them on the way home is the difficult part.