me
Ring your current supplier, ask how much you've used in kWh for the last 12 months. Ignore their spiel because they'll try and get you to stay.
Then register with moneysavingexpert energy club.
Put your current details in & it will check supplier uswitch won't tell you about. Also check prices for having a different gas/electric supplier rather than dual fuel.
If you switch check your old supplier doesn't owe you money.
I could save pil £600 a year but they won't switch from bg.