I'm not sure I believe the story. The girl makes no fuss at the till, doesn't ask for management, walks out and eats the quiche (too distressed to call a manager but not too distressed to eat) but later decides to contact the paper?
If any of you were annoyed at having been refused a quiche moment, would your initial and only reaction be to contact the papers, or would you write in to Tesco/go back to speak to the manager etc?
The fact they have CCTV, till records etc means that there's no way that, had it happened, they wouldn't have found the till person responsible. Besides, if all the technology in the world had failed surely the girl could have pointed out the person who served her? She was standing in front of her long enough to get a detailed description?
Sorry, a bit too far fetched for me!