I've never been to Harrods. I suspect they probably wouldn't let the likes of me enter their store anyway. I have been in Ikea. I can recommend not putting lingonberry sauce on the meatballs in gravy: the result is exceedingly bizarre. It's not inedible but it's like a sort of savoury toffee sauce. tbf to them, I don't think you're actually meant to do that; it was just the usual misadventure that I seem to make a pastime.
