Castle's hydro power

You report (25 July) that Windsor Castle is to have 200 kilowatts of electricity - about a third of its consumption - supplied by a hydro electric plant. But the electrical consumption for my modest house was 520kwh for May.

Perhaps its extraordinary low consumption of electrical power shows why the House of Windsor still seems to be stumbling about in the Dark Ages.

On a more constructive note, could we be informed as to how long it will take to recover the costs of this 1 million investment? This would be a more meaningful figure and reduce the pressure on myself to turn off lights when I leave a room.

GEORGE R GRAHAM

St Margaret's Road

North Berwick, East Lothian