London

London's luxury heartland runs from Mayfair and St James's through Knightsbridge to Belgravia, where the Ritz, Claridge's, the Connaught, the Dorchester and the Berkeley have set the standard for a century. The museums — the British Museum, the National Gallery, the V&A, Tate Modern — are free, the theatre is the world's deepest, and the food ranges from Michelin tasting menus to Borough Market. Late spring through early autumn is the pleasant window; December is festive and cold. The Tube, Elizabeth line and contactless payment make getting around simple; Heathrow, Gatwick, City, Stansted and Luton each serve different routes, so check which airport before booking transfers.