There are underground tea rooms where you can gorge on exquisite baking both sweet and savoury, a selection of teas, often on vintage china, in other words a full British afternoon tea. Having recently spent over £40 on a shoddy afternoon tea in a London hotel, with stale cakes, unimaginative sandwiches and no toasted teacakes, crumpets or anything yummy, believe me you will get a better experien…