Households could save money on their energy bills thanks to a new scheme introduced by West Norfolk Council.
More than 16,000 residents across the county have registered with the Big Switch
and Save, which helps to find the cheapest tarrif for those taking part.
By grouping thousands of homes, the scheme manages to negoiate lower prices than if an individual was switching supplier on their own.
The more residents who join, the stronger the bargaining power, so the borough council has joined forces with other Norfolk councils.
People have until Monday, April 8 to sign up online before energy companies compete in an auction to make the best offer.
There will be no obligation to switch supplier.
Councillor Adrian Lawrence, cabinet member for community, encouraged people to spread the word among their family, friends and neighbours.
Visit www.bigswitchandsave.co.uk to sign up.