§ Mr. Hardyasked the Secretary of State for Energy how many boreholes have been drilled by or on behalf of the National Coal Board since April 1974 and how many seismic survey lines have been put down in the same period.
§ Mr. John MooreThe published reports of the National Coal Board for successive years include the following information:
Number of boreholes completed Length of seismic survey lines completed (kilometres) 1974–75 *110 613 1975–76 *191 497 1976–77 *190 393 1977–78 *135 539 1978–79 153 440 1979–80 126 2,366 1980–81 121 829 †1981–82 na na TOTAL 1,026 5,677 * Boreholes over 1,000 feet deep. † Figures for 1981–82 are not yet available.