Check the queue at the main till, and weigh this up against the number of items you have in your hand (a litre of milk, a chocolate bar, a toothbrush and a small bag of salad). Make the decision that scanning these four items at the self-service check-out can't possibly take longer than waiting in the assistant-serviced queue, especially as the current customer, a fur coat-clad woman, is arguing about the supermarket running out of GM, gluten-free, diet, sugar-free, fat-less lettuce and having to pack her own bag. This despite the fact that the assistant, who, although half your age, is certainly worth you standing there and being mentally undressed by you as you wait. But you sensibly opt for speed over a very attractive young woman. Press “Begin”, and scan in your loyalty card so the machine can spit out some extremely “relevant” offers when you have completed your purchase, thus proving that the supermarket knows everything about you - your buying habits, your shirt size, whe...
On my soapbox again!