Of course, we also saw some shops from the outside as well as the inside! In London, you find many shopping centres like the Harrods
You can stay the whole day in these shopping centres since you just get everything there but most things are quite expensive.
Of course, they also have a Food Hall but you should rather not go there when you are hungry =)
Another cool thing is the personal shopping room ...you sit there and models that have a similar stature come in with the things you are interested to buy. But I think I don't have enough money to be able to get such a personal shopping room