HC Deb 18 October 1966 vol 734 c12W
Mr. Lubbock

asked the Secretary of State for Defence (1) what is the estimated cost of replacing incorrectly specified steel plate used in the construction of the Polaris submarines under construction for the Royal Navy;

(2) why the specifications for steel plate used in the construction of Polaris submarines for the Royal Navy provided initially by the United States Government were rejected and replaced by alternative specifications which later proved inadequate.

Mr. Healey

The original specification fully met all the requirements as then known. It has now been found that the steel has rather more small non-metallic inclusions than the latest American steel which has been developed since our original orders were placed. It is not intended to replace the steel plates produced to the original specification. Some repair may be necessary during service but it is too soon to estimate the extent or cost. The reasons for the defects that have come to light are already the subject of expert investigation in collaboration with industry and independent consultants.

Mr. Lubbock

asked the Prime Minister whether he will initiate an inquiry into the departmental procedures which led to the setting of incorrect specifications for steel plate used on the hulls of the Polaris submarines under construction for the Royal Navy.

Mr. Healey

I have been asked to reply.

I would refer the hon. Member to my answer to his other Questions on this subject.