You can find out who your current gas and/or electricity supplier is by looking at the top of a recent bill or letter. If you don’t have a bill or letter, don’t worry you can find out using the methods below:
For gas: you can find out who your gas supplier is by contacting the Meter Number Helpline on 0870 608 1524.
For electricity: you can find out who your electricity supplier is by contacting your regional electricity distribution number. You can find the number on Nationalgrid.com (link: http://www2.nationalgrid.com/uk/Our-company/electricity/Distribution-Network-Operator-Companies/)