As it is summer, I need to warn the Americans. Don't plan on buying cold drinks while out & about. Most shops sell water and sodas from the very inefficient "open coolers". Where we are used to getting drinks just slightly above freezing, the Brits seem happy with beverages slighlty below room temperature. Unless you get ice, done plan on being refreshed. The first thing I did when I got back to Boston was have some cold milk.