Shell Energy: The Exit From UK Household Supply

Shell Energy no longer supplies gas or electricity to homes in Britain. In the summer of 2023 Shell announced it would sell its domestic energy business in the UK to Octopus and exit the market, and that process was completed on 1 December 2023¹. Around 1.3 million customers moved across to Octopus as part of the sale². If you held a Shell Energy account, your supply, your credit balance and your meter data now sit with Octopus Energy, and every question about your bill or tariff goes to Octopus, not to Shell.

The exit ended a short and eventful run as a household supplier. Shell had entered the domestic market by buying First Utility, one of the more prominent challenger brands, and renaming it Shell Energy¹. In the space of a few years the business absorbed the customers of five failed suppliers, was reviewed by the regulator alongside every other large supplier, and was then sold on. This page sets out the full sequence, what the takeover means for households in practice, and what a former Shell Energy account means for a home working towards energy independence.

Shell has left the UK domestic market

The sale was announced in the summer of 2023 and completed on 1 December 2023, when Shell Energy Retail was taken over by Octopus Energy¹. Ofgem's supplier-level satisfaction survey for that period reported Shell Energy Retail as a separate entity precisely because the fieldwork took place before the takeover⁶. After that date there is no Shell Energy domestic account, no Shell Energy tariff and no Shell Energy customer service team: the business, and the roughly 1.3 million households on it, belong to Octopus².

For the households involved, the mechanics followed the standard pattern for a voluntary market exit. Supply is not interrupted, credit balances carry across, and customers are free to switch to another supplier. Octopus itself has taken on customers from a range of suppliers that either ceased trading, like Bulb, or exited the market voluntarily, such as Shell Energy⁴. The result of that growth is that Octopus is now the number one electricity supplier in the UK and the second-biggest gas supplier, behind British Gas⁴, a position confirmed in Ofgem's own market reporting, which notes that six large companies dominate the domestic market with 91% market share and that Octopus is the largest electricity supplier⁷. A fuller account of the transfer is on who took over Shell Energy customers, and the wider picture of consolidation is in energy supplier market share.

How the supplier changed hands from Shell Energy to Octopus

The brand Shell Energy was itself a rebrand rather than a start-up. First Utility, one of the more prominent challenger energy brands, was acquired by Shell and renamed Shell Energy¹. That gave Shell a ready-made customer book and billing operation, and for a few years the company operated as a large challenger sitting outside the traditional big six, a group whose composition has changed repeatedly as challengers have risen and failed¹.

The second change of ownership came quickly. Having absorbed the customers of several failed suppliers in 2021 and operated through the energy crisis, Shell announced in the summer of 2023 that it would sell the domestic business to Octopus and exit the market, with the sale completing on 1 December 2023¹. Octopus, founded in 2015, now accounts for almost a quarter of the domestic electricity market⁸. The sequence means a household could have been a First Utility customer, become a Shell Energy customer without choosing to, and then become an Octopus customer without choosing to, all inside a decade. The pattern of brands being bought, renamed and absorbed is traced in who owns which energy supplier, and the wider churn among smaller suppliers in challenger energy suppliers.

Who ended up with a Shell Energy account

A large share of Shell Energy's book arrived through failure rather than choice. Between July 2021 and July 2022, 29 energy suppliers stopped trading, and their customers were redistributed to surviving suppliers under the supplier of last resort process⁹. Shell Energy was one of the companies that took customers on:

• Green Supplier Limited: around 255,000 domestic customers, from 27 September 2021³
• Pure Planet: around 235,000 domestic customers, from October 2021³
• Colorado Energy: domestic customers, from October 2021³
• Daligas: around 9,000 domestic and non-domestic customers, from 17 October 2021³
• GOTO Energy: around 22,000 domestic customers, from 21 October 2021³

Those households were added in a matter of weeks, and most of them had never chosen Shell. The same period saw Octopus take on Avro Energy's roughly 580,000 customers, and later 1.5 million customers from the failed supplier Bulb². The failures themselves, and what happened to the customers of each, are covered in energy supplier failures and supplier of last resort.

One later episode is reported differently. One account states that Rebel Energy was taken over by Shell Energy in April 2025, while another reports that Rebel's customers were transferred to British Gas². The two differ, and households formerly with Rebel should check directly who now holds their account, using the route in finding out who supplies your energy.

Service quality and scores ahead of the switch

Shell Energy's record on service was mixed, and the most telling evidence comes from the regulator rather than from review scores. When Ofgem completed its review of how suppliers support customers in vulnerable situations, it grouped suppliers by the weaknesses it found, and Shell was placed in the second group, identified with moderate weaknesses¹¹. Shell Energy and E.ON Next joined the Vulnerability Commitment at the start of 2023, taking the commitment to 13 signatories¹², covering over 90% of the domestic UK market⁷.

The wider satisfaction picture gives the context. Ofgem's state of the market report recorded 81% of customers satisfied with their energy supplier, the highest level ever recorded in that survey⁷. Its 2024 survey wave found overall customer service satisfaction at 71%, up from 66% earlier that year¹³, and its July to August 2025 survey found a higher proportion of customers reporting they were very satisfied with their supplier's customer service¹⁴. Separately, Ofgem's research on tariff choices noted that most customers already rate their supplier at 3 stars or higher, at 87%¹⁵.

For comparison, the independent customer scores published since the transfer put Octopus at 79%, with Good Energy at 81%¹, So Energy at 76% and Sainsbury's Energy at 76%¹⁶. How suppliers are scored, and how to read the ratings, is explained in energy supplier customer service ratings.

Prices and tariffs under the current cap benchmarks

Shell Energy published no tariff that survives it; former customers now pay whatever Octopus tariff they were moved onto or have since chosen. What can be stated firmly is the regulated ceiling that applies to a household on a default rate. Ofgem's benchmark maximum charges for the charge restriction period set the annual cost of electricity at typical consumption levels by region and meter type. At 3,100 kWh on a single-rate meter, the benchmark annual bill ranges from £977.30 in the North West to £1,005.10 in South Wales¹⁸. At 4,200 kWh on a multi-register meter, the figures run from £1,130.71 in the Midlands to £1,229.07 in the South East and £1,269.48 in North Wales and Mersey¹⁸.

The North West figures differ across the tables, £977.30 and £1,196.71, and they cover different metering configurations rather than one number being wrong¹⁸. For the cap period from 1 October to 31 December 2025, the published levels for North Wales and Mersey were £1,061.64 a year at 3,100 kWh on a single-rate meter and £1,297.15 at 4,200 kWh on a multi-register meter, with a standing charge of £243.15 at nil consumption¹⁹.

On payment, Octopus takes direct debit⁵ and has outlined offering weekly or fortnightly direct debits, with payments reviewed and adjusted more easily¹². Its export tariffs for households with solar, including Outgoing Octopus, the SEG tariff and Flux, have no fixed end date²⁰. The mechanics of changing supplier are in exit fees when switching and does switching cost anything.

Fully renewable power certified through REGOs

Shell Energy sold renewable electricity tariffs, and the system behind that claim is worth understanding, because it is the same system every supplier uses. A REGO, or Renewable Energy Guarantee of Origin, certificate verifies that a specified amount of electricity was generated from a renewable source²¹. One certificate is issued for every megawatt hour of renewable electricity generated²². A supplier offering a 100% renewable tariff must buy enough REGOs to match what customers on the tariff use over a year¹⁷.

The weakness in the system is that REGOs can be sold separately from the renewable energy itself, and assigned by other suppliers to units of energy they sell to the public²². A certificate-backed tariff therefore does not tell you whether the supplier is buying electricity directly from wind farms or matching certificates to wholesale power. The suppliers identified as buying renewable electricity and REGO certificates directly from renewable generators, providing significantly greater support for renewables development, are Good Energy, 100Green, Octopus and Ecotricity²². Uswitch's own Green Accreditation sets a higher bar, requiring 100% of electricity to be bought directly from renewable generators²¹. What a green tariff does and does not mean is unpacked in green energy tariffs and fuel mix disclosure.

What a former Shell Energy account means for energy independence

A household that was with Shell Energy has now been a customer of three companies in quick succession without ever choosing two of them. That is the core lesson of the episode for independence: a supply account is an arrangement with a company whose strategy can change, and the household carries no say in a sale. The dependence that remains after the transfer is on Octopus as a supplier, on the wholesale market behind its prices, and on the price cap as the only regulated ceiling on a default rate.

The practical points are these. Contact for a former Shell account is Octopus Energy, on 0808 164 1088, at hello@octopus.energy, or through octopus.energy⁵. Complaints that Octopus cannot resolve go to the Energy Ombudsman, which can be emailed at enquiry@energyombudsman.org²³. The Energy Bills Support Scheme, which provided a discount on gas and electricity unit prices as a replacement of the EBRS, was paid to households over six months from October 2022 in six monthly instalments of £66 or £67²⁴, and the National Audit Office has reported on how that support was delivered²⁵. The route for a complaint about your supplier is set out in complaining about an energy supplier and the Energy Ombudsman.

Beyond switching, the durable answer to supplier churn is generating your own power. The electricity generated from solar panels is completely free and 100% renewable²⁶, and a home with its own generation and storage answers the question of who supplies it very differently. That route, and what it removes from a household's dependence on any supplier, is covered in energy suppliers and household energy independence, and the full landscape of suppliers in UK energy suppliers.