asked the Secretary of State for Scotland what estimate he has of the average efficiency of SSEB and NSHB oil, coal, nuclear and hydro-electric power stations and the percentage loss of power through transmission in 1973 and 1974.

I am asking the chairmen of the boards to write to the hon. Member.

asked the Secretary of State for Scotland what percentage of electricity was generated from oil, coal, nuclear and hydro-electric power stations, respectively, in 1974 with stated costs of each unit of electricity so produced; and what estimates are available as to the percentage proportions of electricity which will be so produced in 1980, 1985, 1990, 1995 and 2000.

I am asking the chairmen of the boards to write to the hon. Member.