Who's watching who?

Food shopping at M & S this morning, and then off to the coffee shop. J ordered a sausage bap but they had run out of sausage, so they gave him the option of bacon or chicken, but the chicken was an extra £3.50, so of course he went for the bacon. When his order came he was told you can have the chicken at no extra charge, so as you can imagine. he was delighted. He is still full up!  Had a look around the rest of the store but didn't buy anything.