Funny you mention Tesco's. My hubby fall and scratched his knee while I was abroad. As I dont keep any medical stuff at home he went to Tesco's to buy something to cover the wound with. When he got there a very helpful customer assistant convinced him that the one-hour- old wound was oozing pus (!!?) and that he should seek medical help asap. He then disregarded my opinion over the phone (I've only worked in hospitals for ten yeras after all!!!) and still presented himself in the Walk-in- Centre; where he was throughfully laughted at and waited forever to be seen. Exactly what he deserved. At least he didn't call an ambulance...