BT Phone directory The most complete, with good wildcard search options. Use an * asterisk to leave a name or city incomplete: i.e: James Smit* or Cambr*
192.com
192.com One of the best resources to find someone in the UK. You have to register(for free) Some services are available only for a fee.
192 People Finder Using this page you can search over 200 million records from the 2002 to 2007 Electoral Rolls, 13 million people in the Directory Enquiries database, 3 million Director reports and over 300 million Birth, Marriage & Death records from 1837 onwards.
Advanced People Search Find people by family members names or other co-habitees that live at the same address. Allows you to specify any type of location details or no address at all
192.com Family Records Searches all UK Birth, Marriage & Death records from 1837 to 2004 plus 1861 census information
192 Aerial PhotosStreet maps with every UK street labelled and the highest quality aerial photos
Others:
Infobel UK Good search tool, easy to use results, plus a map
InfoSpace’s UK listing Good interface, results not always reliable
Scoot Register, then it’s free
Business numbers:
EYB Yellow Pages Official BT site. Excellent way to search by name, location or industry