HC Deb 20 February 1968 vol 759 c72W
Mr. Marquand

asked the Minister of Power, how many collieries in production in this country have a lower output per man than 44.8 cwts.; and how many such collieries make a profit.

Mr. Freeson

This information is not readily available and I have asked the Chairman of the National Coal Board to write to the hon. Member.

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