LONDON, England: As part of a new scheme called the Demand Flexibility Service, Britain's National Grid said customers would receive money back if they agree to use less electric power during periods of heavy use.

The service, which has been tried but not run in a live situation before, would operate from 5 p.m. to 6 p.m. on Mondays, it added.

An electric oven turned off for that one hour could earn a homeowner a $3.70 credit, said officials.

"This does not mean electricity supplies are at risk and people should not be worried," the National Grid said.

The group also said it had asked for three coal-powered generators to be warmed up in case they are needed, as the country faces a snap of cold weather.