HC Deb 25 February 1982 vol 18 cc455-6W
Mr. Home Robertson

asked the Secretary of State for Energy how many kilometres of high voltage electricity transmission lines have been laid underground in England and Wales; and what proportion of the grid network this represents.

Mr. Mellor

Four hundred and twenty-eight route kilometres of the Central Electricity Generating Board's 400 and 275 kilovolt transmission system have been laid underground. This represents 5.9 per cent. of the total of 7,249 route kilometres.