PS: If you don't know the localpostcode you can still use the same site. Just go here:
http://www.streetmap.co.uk/
Select 'Place Name' and enter the relevant town or village. If there are several places with similar names, you will be prompted to select the correct one. Eventually a map will load with the relevant information in a blue box near to the bottom of the page.
Chris
PPS: Multimap offers a similar facility (and the page loads much faster):
http://www.multimap.com