If you go onto the Adultwork website ( commonly referred to as AW on this site ), there is a search function. One of the options in there is proximity, put in the start of a postcode, de1, le11, ng31 etc and the number of miles you are prepared to travel and it will give you a list of girls in that area.
You can refine it further with other options, age, rates etc. That would be a good place to start.