Morrisions: Pass the cashier the card and they will point at the card slot and ask you to insert it Tescos: Put the card in the slot when asked for payment and they will take it back out and swipe it and then ask you to enter your pin Sainsbury: Insert the card when asked for payment and then get told to remove it until she has pressed a button and then re-insert it again
Most places: type a pin and then press enter Some petrol stations: press enter then type the pin and then press enter again. Of course out of habbit you type the pin, press enter and then stand there like a lemon because you have actually only got as far as the first enter.
I hope they are going to standardise all of this because I never know what to do for the best.