The line-up, twenty-eight women and not a stock photo among them

Each cover gives you four facts: the name she goes by, how old she is, the part of London she lives in and the figure every first hour starts from, which is £400 whoever you choose. Below them runs a status line. Available today means her diary is open; Away means a trip or a rest, with her return date on the profile. We print away when she is away, because a badge that glows around the clock convinces nobody.

Angelika, Luna and Samanta all give W1 as home, so a same-evening knock in Mayfair or along Park Lane rarely keeps anyone waiting. The other twenty-five are spread from Knightsbridge and Chelsea to Soho, Marylebone and Paddington, and each of them travels into W1 at exactly the same rate.

Some readers turn one page and know. Others would rather describe the evening, a private view on Cork Street, a late table near Mount Street, supper sent up to the suite, and have it cast for them. Give Bella the mood and she returns a shortlist of two or three women who are genuinely free, each with a line on why she would suit.

Every image here is glamour and lifestyle photography with the faces gently softened, never any nudity and never a borrowed shot. How each set is made and checked lives on the photo policy page, and the first message is walked through on booking.