An explanatory document entitled Health activity relating to people at ports, airports and international train stations in England was published on 31 July 2006 on the Department of Health website at:
http://www.dh.gov.uk/en/Publicationsandstatistics/Publications/PublicationsPolicyAndGuidance/DH_4137780
and on the Home Office and Health Protection Agency websites in early August 2006 at:
http://www.ind.homeoffice.gov.uk/6353/6356/healthactivity.pdf
and
http://www.hpa.org.uk/porthealth/who_is_responsible_for_what_at_ports.pdf
respectively.