HC Deb 30 April 1947 vol 436 c1930
10. Commander Noble

asked the Secretary of State for Foreign Affairs how much iron and steel and other manufactured material was destroyed with the blowing up of Heligoland.

Mr. McNeil

Apart from explosives, about 1,200 tons of iron, steel and manufactured material, of which 85 per cent. consisted of guns and emplacements, were destroyed in the recent demolitions of fortifications and warlike stores.