You could go and view the trolley protruding from the wall at “Platform 9¾” in King’s Cross Station for your dose of Potter tourism, but a more pleasant stop on the trail is the City of London’s beautiful Victorian Leadenhall Market. The curved-fronted entrance to the Leaky Cauldron is at 42 Bull’s Head Passage – it’s actually an optician’s. Then the secret “Diagon Alley” was filmed in the market itself, though being a muggle, you might not recognise it as such. If you’re disappointed that there’s no Eeylops Owl Emporium or Quality Quidditch Supplies, you can always have a pint in The Lamb, where John Wayne started a bar-room brawl in the 1975 film Brannigan.
• Leadenhall Market