You can choose who supplies your energy. This company is known as your energy supplier and they bill you for the energy you use. If you're not sure who your energy supplier is, you'll need to contact your energy network operator who can help you to find out.
Your energy network operator can can also help you with things like connecting your property to electricity or gas and moving your meter.
Find your energy network operator
Using your postcode
Type your postcode, splitting it correctly across the two boxes and then press go.