HC Deb 19 January 1987 vol 108 c455W
Mr. Dalyell

asked the Secretary of State for Defence what assessment his Department has made with regard to the vulnerability of the United Kingdom's early warning systems to the effects of electromagnetic pulse from a nuclear weapon exploding in the atmosphere above the United Kingdom.

Mr. Stanley

The requirements for electromagnetic pulse protection have been and will continue to be assessed in relation to both existing and future early warning systems for the United Kingdom. It would not be in the public interest to provide details.