HC Deb 23 November 1987 vol 123 c19W
22. Mr. Summerson

To ask the Secretary of State for Energy what are the latest figures for productivity in the coal industry; and what were the comparable figures 10 years ago.

Mr. Michael Spicer

For the week ending 31 October, average deep mined revenue output per man shift was 3.72 tonnes, an increase of some 70 per cent, on the average of 2.19 tonnes for 1977–78.