Ordnance Survey maps, aerial photos and reports
http://www.promap.co.uk/promap/index.jsp

Planning Policy Guidance & Statements for England
http://www.planningportal.gov.uk/england/professionals/en/1020432881271.html

The Land Registry
http://www.landregistry.gov.uk/

Manual for Streets
http://www.dft.gov.uk/pgr/sustainable/manforstreets/

Planning Policy Guidance Website
http://www.planningjungle.com/

Planning Policy Guidance Website
http://www.planning-applications.co.uk/page1.htm