§ Sir Hugh RossiTo ask the Secretary of State for Transport what assessment he has made of the implications for the ozone layer of the use of halon gas in equipment to protect from fire hazard the new tunnel being built to Bank underground station for the Dockland light railway.
§ Mr. Portillo[holding answer 13 July 1989]: Halon fire fighting equipment has been provided at a small number of strategic locations on the Docklands light railway where, if a fire occurred, there would be significant direct risk to life.
Questions concerning the ozone layer are for my right hon. Friend the Secretary of State for the Environment, but the impact on the ozone layer of intermittent use of halons in this particular example would be negligible.