FOUR hours later she's on a reformer in a Pilates studio in an upscale alley called Neal's Yard, the car and driver from Blue Ant waiting out on whatever street it is. The reformer is a very long, very low, vaguely ominous and Weimar-looking piece of spring-loaded furniture. On which she now reclines, doing v-position against the foot rail at the end. The padded platform she rests on wheels back and forth along tracks of angle-iron within the frame, springs twanging softly. Ten of these, ten toes, ten from the heels ... In New York she does this at a fitness center frequented by dance professionals, but here in Neal's Yard, this morning, she seems to be the sole client. The place is only recently opened, apparently, and perhaps this sort of thing is not yet so popular here. There is that mirror-world ingestion of archaic substances, she thinks: People smoke, and drink as though it were good for you, and seem to still be in some sort of honeymoon phase with cocaine. Heroin, she's read, is cheaper here than it's ever been, the market still glutted by the initial dumping of Afghani opium supplies.