Eep! Now I *know* I replied to this, I remember typing it, but it most not have got here. So sorry for the delay, but thanks so much for reading and commenting. I know *just* the sort of shop assistant you're talking about, too; the ones who look at you like you're not dressed well enough to walk in their shops (as if they really owned them) or watch your every move like you might lift a packet of needles or something. You're friend's story is fantastic, I wish I'd thought of that!