Rebel Energy exited the domestic supply market in April 2025, affecting some 90,000 customers, according to Ofgem's State of the Market report1. The Energy Ombudsman records that Rebel Energy ceased trading on 1 April 20252, and Citizens Advice lists the same month for the transfer of its customers to British Gas3. Which? states that Rebel Energy's customers have been transferred to British Gas4.
Ofgem's report, published in April 2025, gives the customer number in its summary of retail market developments: "In April 2025, Rebel energy exited the market impacting some 90,000 customers."1 The same report counts 23 active suppliers in the domestic gas and electricity retail market, with the six largest holding a 91% market share1.
"In April 2025, Rebel energy exited the market impacting some 90,000 customers."
The failure also removed Rebel Energy from other reporting. Ofgem's Smart Export Guarantee annual report for SEG Year 5, covering 1 April 2024 to 31 March 2025, states that Rebel Energy Ltd is not included because it ceased trading on 1 April 2025 and did not provide data on its tariff offerings, uptake or payments5. The SEG, which came into force on 1 January 2020, requires licensed suppliers to offer at least one export tariff paying above 0p/kWh at all times to eligible small-scale generators5.
The Energy Ombudsman's page on British Gas disputes records the date of the collapse and directs former customers to information from Ofgem and from British Gas2. Citizens Advice sets out the position for households whose supplier stops trading: supply continues, the account moves to a new supplier, and the customer is normally told when the move happens3.
| Old supplier | New supplier | Date |
|---|---|---|
| Rebel Energy | British Gas | April 2025 |
| Tomato Energy | British Gas | November 2025 |
| Shell Energy | Octopus Energy | December 2023 |
| Bulb | Octopus Energy | December 2022 |
| Together Energy | British Gas | January 2022 |
Source: Citizens Advice3. EDF's guide gives the same pairing for Rebel Energy, with the date 1 April 20256.
Why it matters for households
A supplier failure moves a household onto a new supplier chosen by Ofgem rather than by the customer, and the old tariff normally ends. EDF's guide states that customers are typically placed on a deemed contract, that credit balances are protected, and that no exit fee applies if the household later switches6. It also notes that bills may rise, particularly where the failed supplier was selling energy too cheaply6. For a home's energy independence, the practical effect is that the choice of supplier and tariff is made for the household at the point of failure, and any export payments under a SEG tariff depend on the new supplier's own tariff offering5.
What happens next
No further dated steps for Rebel Energy customers are set out in these sources. The Energy Ombudsman states that it is not accepting new disputes about companies that have ceased trading, and that complaints about the new supplier should go to that supplier first2.
Sources6 cited
- Ofgem State of the market report, ofgem.gov.uk
- British Gas Complaints: Raise a dispute… | Energy Ombudsman, energyombudsman.org
- Check who's taken over your energy supply - Citizens Advice, citizensadvice.org.uk
- Best Energy Suppliers 2026: Which? Energy Company Survey Results - Which?, which.co.uk
- SEG Annual Report - SEG Year 5, ofgem.gov.uk
- What happens if my energy supplier goes bust? | EDF, edfenergy.com