19th July 2010, 05:38 PM
Rather than spout off myself about the range of techniques applied. Why don't you take a look at some of the 5000+ reports lodged in the Archaeology Data Service's Grey Literature library http://ads.ahds.ac.uk/catalogue/library/.../index.cfm You can search by contractor, but if you go to the main search page and put London in the County box you'll get results for one well known urban area. Similarly putting York in the district/unitary authority box gets quite a few hits too. Happy reading!