Supermarkets
Usually I don't need go to the supermarket in England because the family with I'm living do the groceries always. But sometimes I have gone to the supermarket close to my house.
The most important difference is the price, to do the grocery in England is more expensive than in Spain. Although some supermarkets are more expensive than others and I think this is one of most expensive.
What strike to me most is that in England there are many kinds of tea but there aren't any herbal tea in supermarkets. You must go to others kind of shops more specific...I find this very annoying!
In general I miss many food, in Spain there are more kind of products. For example, the majority of cheese here is cheddar and not much choice. I miss chorizo, jamón, morcilla, mortadela...English bacon can never replace them!! Is the same with legumes...and there isn't tomato sauce (not ketchup)!!
I can't find a good mature cheese but I can buy cards in the supermarket to congratulate somebody for his new change look!! English people love to give cards for everything. In this supermarket there are a big shelf full of cards.
Furthermore, supermarkets in England are how in Spain. The same offers, the same questions "do you want bag?" "Do you have a membership card?" ...