So I turn up at the WRVS Hospital shop and grab a BLT and a cappuccino out of the machine.
"Did you realise we are doing a meal deal and you could have your drink and sandwich with a packet of crisps for £3.50?"
I decide my emergency intake of saturated fats is quite sufficient without adding a bag of Gary Linekar's fried potatoes. "No, I'll stick with just these thanks".
She rings the till.