Although it's the Queen's grocer, this store is, paradoxically, the most egalitarian of gift shops; it has plenty of irresistibly packaged luxury foods, stamped with the gold by appointment crest, for less than £5. Try the teas, preserves, blocks of chocolate, tins of pâté, or a box of Duchy Originals oatcakes -- like Paul Newman, the Prince of Wales has gone into the retail food business. Tube: Piccadilly Circus.