Institution of Railway Signal Engineers
http://www.irse.org
Network Rail
http://www.networkrail.co.uk
Office of Rail Regulation
http://www.rail-reg.gov.uk
UK Rail Supplier Qualification Scheme
http://www.achilles.com/uk/transport
Rail Accident Investigation Branch
http://www.raib.gov.uk/home/index.cfm
Rail Safety and Standards Board
http://www.rssb.co.uk
Transport for London
http://www.tfl.gov.uk/home.aspx
The Yellow Book - Engineering Safety Management
http://www.yellowbook-rail.org.uk
Impress Media - Designers and developers of this website
http://www.impress-media.co.uk
