In HKG prices were OK, import duties are very low.The M&S food prices here are ridiculously prohibitive- so I make very good use of their sale rail, I have had some great bargains. I still baulk at paying the equivalent of 1 gbp for a can of soup, but it beats their usual average of around 3+ gbp.
Close to nill on wines, which allowed them to become one of the biggest wine hubs in the world.