The Health & Safety Executive www.hse.gov.uk
Here you will find details of up to date legislation that may affect your business.  Also you can access the HSE bookstore to buy their valuable publications.

The British Standards Agency www.bsi-global.com
What are British Standards and how do they affect your business?

UK Civil Engineering www.ukcivilengineering.com
Information and trade directories for the building sector

Parker Ellis Publishers www.parker-ellis.co.uk
Online trade directory for all building, civil engineering and architects, Home of "House Builder and Developer Datafile", Civic and Public Building Specifier" and Architectural Technologist" publications, subscriptions available free. Online trade directory of building suppliers, advertisment features.