Escorts in SW7: a floor plan from the museums to the W8 and SW5 edges

South Kensington is the home district: Exhibition Road and its three great museums, with SW7 3ER, SW7 5BB and SW7 5LR among the hotels. Gloucester Road, one stop west, carries the larger hotels along Cromwell Road and the Piccadilly line straight in from Heathrow. Queen's Gate and the Royal Albert Hall are SW7 as well.

Kensington covers the gardens, Kensington Square and the mansion flats, where W8 4PT and W8 5DL overlook the park. High Street Kensington is the shopping street, the Design Museum and the antique dealers of Kensington Church Street. Most W8 bookings are to private addresses rather than hotels.

Earls Court is tall white stucco, garden squares and boutique hotels, served by Earl's Court and West Brompton stations, and livelier after dark than either of its neighbours.

Some addresses sit close to a boundary. SW7 5BB on Hyde Park Gate is SW7, yet the mansion blocks of De Vere Gardens a few steps away are W8, and several hotels on Cromwell Road west of Gloucester Road carry SW5 on their letterheads. None of this changes a booking; it only tells you which page to open first.

All three codes fall inside Zones 1 and 2, and nobody is ever billed for her journey. One hour is £250, a dinner date of four hours £900, and ten hours overnight £1,800, with the full ladder on the rates page. Across the belt, a standard hotel or residence booking is confirmed in writing and paid to her in person. Overnights, events and travel are planned a day or so ahead. Once confirmed, a companion is normally with you about an hour later at any address in the three codes, longer at the evening rush, and the chat carries her exact time as soon as she sets off.

South Kensington is home to Danielle, Milena and Thea, which makes SW7 the best supplied code on the map. No companion gives W8 or SW5 as her home district, but both are a short ride from SW7, and the whole gallery covers all three.