Belgravia, SW1X and SW1W, where the evening stays hushed

Belgravia was built to impress, and it still does, with the great mansions of Belgrave Square, the quiet gardens of Chester Square and the long columned sweep of Eaton Square. The real charm, though, is in the smaller streets: the curve of cream houses on Wilton Crescent, Kinnerton Street with The Nags Head, a tiny pub that asks guests to keep their phones in their pockets, and Motcomb Street, lined with galleries and little restaurants.

Elizabeth Street is the village high street, with its bakeries and florists and, on the corner of Ebury Street, the sugar pink front of Peggy Porschen, and at Christmas its lights make the short walk from Eaton Square feel like a stroll through a snow globe. Further south, Pimlico Road gathers antique dealers and design showrooms whose windows stay lit long after closing.

The embassies and private homes of the district keep it discreet by nature. Doormen are used to visitors at every hour, and nobody here looks twice.

The Berkeley on Wilton Place, home to the Blue Bar, painted a shade of blue that seems to glow after dark. The Goring on Beeston Place, with its hidden garden and elegant dining room, a short walk from Buckingham Palace. The Lanesborough, a Regency landmark facing Hyde Park Corner, where every room comes with its own butler. Hotel 41, a small and clubby hotel high above Buckingham Palace Road, overlooking the Royal Mews.

These are landmarks rather than partners, and London Babes holds no arrangement with any of them. Private residences and serviced apartments across the district are visited in the same unhurried, low key way.

Four stations ring the district. Victoria, with Circle, District and Victoria line trains plus National Rail, is around 5 minutes from its southern edge. Eaton Square is about 6 minutes from Sloane Square and its Circle and District platforms. From the middle of Belgravia, Hyde Park Corner takes roughly 7 minutes on foot, far less from The Lanesborough, and Knightsbridge, another Piccadilly line stop, is some 8 minutes from Belgrave Square.

One message on WhatsApp or Telegram starts it: the companion, the address, the hour and how long. For a residence the desk asks for your full name and the house or flat details; for a hotel, the room number. Everything is confirmed once, in writing. A standard visit is then secured by transferring 25 percent of the fare, while overnight stays or events carry a 50 percent deposit with its travel element non-refundable.

Arrival in Belgravia is usually around 40 minutes after confirmation. She rings the bell or approaches the front desk like any invited guest, and the remainder changes hands discreetly, in cash or by transfer.

Eight o'clock, drinks in the Blue Bar at The Berkeley, surrounded by that famous blue. Nine, a table at Zafferano on Lowndes Street for a long, slow dinner. Half past ten, a walk through the lamp lit streets to Kinnerton Street for a nightcap at The Nags Head, conversation without a single screen in sight. Then home, or back to your hotel, as the square gardens settle into darkness.

Count it as a four hour dinner date, £1,300. Staying in instead? Three hours at £1,050 leave room for dinner brought up to the suite and a slow conversation afterwards.

Residents of the square houses and mansion flats, who value a visitor who is elegant, punctual and discreet. Business visitors staying at The Berkeley or The Lanesborough, with late dinners and early starts. Guests who have chosen Belgravia precisely because it is quiet, and want their evening to match. Each wants the same thing: a calm arrival, a warm companion and nothing to explain afterwards.

Lea, petite with long auburn waves, loves the theatre, handmade ceramics and beautiful interiors. Patricia has long auburn brown hair, paints watercolours and adores old film noir and cosy bookshops. Violetta, tall and slender with sleek black hair, swims, loves stand-up comedy and has a dry, perfect sense of timing.

Living among these squares, they know the doors and the doormen. Every other companion in our line up comes here on identical fares.

Walk north up Sloane Street and you reach Knightsbridge. To the south west, Sloane Square opens onto Chelsea and the King's Road. East, Buckingham Palace Road leads to Victoria and, beyond it, Westminster. Hyde Park Corner is the doorway to Mayfair.