With a final glance round the room, she picked up the black handbag she had tossed on the bed, checking to make sure she carried only money, her keys, and two small plastic bags which contained the drug. That done, her preparations complete, she left.

A few moments in the lift and she was out of the building, breathing in the mixed perfumes of the city night, that teeming blend of machinery and humanity peculiar to this corner of London. As always, before heading towards Praed Street, she glanced fondly at the smooth stone exterior of her own building, her eyes gliding over the words Shrewsbury Court Apartments which served as epigraph above the double front doors. They opened upon her hideaway and harbour, the only place on earth where she could be herself.

She turned away, walking towards the lights of Paddington Station where she took the Circle Line to Notting Hill Gate, and from there the Central to Tottenham Court Road with its heady miasma of exhaust fumes and its pushing crowds of a Friday night.

She made her way quickly to Soho Square. Here, the patrons of nearby peepshows were milling about, their voices ringing with every possible accent as they exchanged lewd evaluations of the titillating sights they'd had of breasts and thighs and more. They were a surging mass of prurient thrill-seekers, and Tina knew that on another night she might have considered one or more of them as possibilities for an amusing encounter of her own.

But tonight was different. Everything was in place.

In Bateman Street, a short distance from the square, she saw the sign she was looking for, swinging above a malodorous Italian restaurant. Kat's Kradle, it announced, with an arrow pointing into an unlit alleyway next door. The spelling was absurd, an attempt to be clever that Tina always found especially repellent. But she had not been the one to select the rendezvous, so she made her way to the door and descended the stairs which, like the alley in which the club was housed, were gritty and smelt of liquor and vomit and plumbing gone bad.