From personal experience (and many others here too) I can recommend Sofia:
External Link/Members Only or
External Link/Members OnlyCheck her reviews. IMO pretty, convincing, immaculately clean, welcoming, perceptive of your wants and most of all, sexy.
She's not showing her rates at the moment (she takes a short rest every now and then) but great for first-timers because you can see her for 1hr at £200, or 30mins at £100.
Based in Central London but regularly travels to Bristol, the South Coast and elsewhere.
Thank me later