Britain's oldest wine merchants, Berry Bros & Rudd have dispensed rare vintages to bon viveurs since 1698. Still a. Family business, the shop has barely changed since the Widow Bourne opened The Coffee Mill, selling spices, tea and coffee. The original scales have been used to weigh famous customers (including Lord Byron and Napoleon III) for 300 years. A secret tunnel, now blocked, linked the Warren of cellars to St James' Palace, so royals could pay clandestine visits to the ladies of the night who frequented the shop. The shops cellars hold 100,000 bottles, but patrons' finest vintages - worth a staggering £650 million - are laid down in a warehouse in the less romantic Basingstoke.