Based on a comparison between the annual bill for a customer on a standard variable tariff and the annual bill for a customer on our Help Beat Cancer Fixed Apr 2026 TM1 or Help Beat Cancer Fixed Apr 2026 TM4 tariff for a typical household which is defined as one that uses 11,500kWh of gas a year, and 2,700kWh of electricity a year, and paying by Direct Debit.

Electricity used will be charged at your normal unit rate and you will later have your bill credited for the energy you used. The credit is calculated as half of your electricity unit rate (excluding VAT) and will show as 'Power Saver Credit’ on your bill or statement. Your daily standing charge will be paid at your normal rate. See Terms and Conditions.

Large suppliers which includes those with a market share of at least 5% in either fuel (Gas or Electricity).

£50 is transferred to customer’s bank account or sent as cheque. Service Promise available until 31st March 2025 on selected plans provided by Domestic & General.  Engineer will attend by the end of next working day, when no heating or hot water reported before 8pm, but repair not guaranteed in that time.  View full T&Cs here.

All electricity used will be charged at your normal unit rate based on your ScottishPower tariff. The credit for your EV smart charging session will appear as credit on your bill. The greenest times of day will be when the carbon intensity of the electricity required to charge your EV is at its lowest. This will vary each day depending on a number of factors, including weather conditions, renewable energy generation and demand on the grid.