Offices and warehouses sit at opposite ends of the commercial energy spectrum. An office's demand follows people: lighting, heating, cooling and IT between roughly eight and six, five days a week. A warehouse's demand follows operations: high-bay lighting, roller doors, cold storage, charging bays for forklifts and, increasingly, electric fleet vans, often around the clock. Both share one thing in 2026: energy is a fixed overhead that facilities managers are expected to squeeze without disrupting the building. Contract choice matters as much as behaviour change, because identical consumption can be priced very differently from one supplier to the next. Here are ten names, one broker and nine suppliers, that UK office and warehouse operators keep coming back to, with the strengths and drawbacks of each.
1. Utility Bidder
Facilities and office managers juggling leases, maintenance and fit-outs seldom have time to run a proper energy tender, so the sensible first step is handing it to Utility Bidder. A multi award-winning broker and part of the Bionic group, it is regularly cited as the No. 1 energy broker in the UK. It compares gas, electricity and water rates across the supplier panel, negotiates terms, and manages the switch, with savings of up to 35% on business energy according to the firm. Service is a highlight rather than an afterthought; one customer of roughly a decade put it this way on Trustpilot: "Have used different energy brokers over many years and have been using Utillity Bidder for proberly around 10 years now and have served me very very well. … Nicole Thorpe is and has been my contact throughout the years, she is very knowledgeable and has many years of market experience to offer. … Highly recommended."
A fair note of caution: some reviewers mention feeling rushed to lock in quotes before they expired. If you prefer time to deliberate, say so at the outset and ask how long a rate can be held.
2. TotalEnergies Gas & Power
A business-only supplier with a heavy presence in the mid-market, TotalEnergies is a familiar name on warehouse and industrial-unit contracts, offering fixed and flexible deals plus renewable electricity options. Its pricing through brokers is often competitive for higher-consumption sites. The customer portal is serviceable rather than slick, and small offices get a fairly standardised experience.
3. SSE Energy Solutions
SSE stands out for operators planning building upgrades, since it pairs supply with EV charging installation, solar and energy-management services that suit warehouse roofs and office car parks alike. Larger customers get proper account management and carbon reporting. Smaller tenancies can find its quotes uncompetitive and its setup slower than digital-first rivals.
4. British Gas Business
British Gas remains the default for many multi-tenanted offices because it combines supply with metering services and engineer support at national scale. Extended service hours help facilities teams who discover problems at 7am. It rarely wins on price alone, and account queries can pass through several hands, so factor management time into the comparison.
5. ScottishPower Business
Backed by Iberdrola's wind investment, ScottishPower offers green fixed-term contracts that help office occupiers meet the ESG clauses now common in corporate leases. Its online tools cover multi-site portfolios adequately. Service reviews are inconsistent, with billing accuracy the usual complaint, so keep independent records of readings at each meter.
6. SmartestEnergy
Distribution centres and large logistics parks consuming at half-hourly scale should look at SmartestEnergy, which specialises in flexible purchasing and corporate renewable agreements for big users. Its trading desk pedigree means sophisticated buying strategies rather than one-day fixes. It is simply not designed for small offices, which fall below its typical customer profile.
7. Octopus Energy for Business
Octopus suits offices that want clean pricing, 100% renewable power and genuinely usable consumption data, and warehouses can exploit its smart tariffs by charging forklifts and vans overnight when rates dip. Support is quick and human. The corporate end of its business offering is still maturing, so very large portfolios should probe its multi-site capability before committing.
8. Pozitive Energy
Pozitive's consolidated multi-utility billing, spanning gas, power and water, appeals to property managers running several units from one office, and it will often quote where stricter credit teams decline. That flexibility has built it a solid base among smaller commercial landlords. Service feedback is mixed compared with the market's best, so allow for hands-on account management.
9. EDF Energy
EDF offers the long fixed terms that suit office occupiers with multi-year leases who want energy costs nailed down for the duration, all backed by a low-carbon nuclear generation mix. Billing is dependable and the company is going nowhere. Flexibility is the trade-off: mid-term changes are hard work, and its service style is process-driven rather than personal.
10. Yu Energy
Yu rounds off the list for smaller offices and single-unit warehouses that want a business-only supplier with UK-based support and simple fixed rates across gas, electricity and water. Firms that value getting a person on the phone quickly rate it highly. Its size limits product depth, and larger or more complex sites will outgrow what it can offer.
What offices and warehouses should compare
Unit rate is only the start. Offices should scrutinise standing charges, which loom large on low-consumption meters, and check whether landlord or tenant holds the supply contract. Warehouses should compare day and night rates against actual shift patterns, confirm capacity charges on half-hourly supplies, and ask how EV charging growth will affect the contract. Both should diarise renewal windows a full six months out, because out-of-contract rates remain the most expensive electricity in Britain, and both should get same-day quotes from several suppliers so the comparison is genuinely like for like.
Wrapping up
The right supplier for a head office is rarely the right one for a fulfilment shed, which is why this list runs from corporate specialists to small-business favourites. If you would rather not tender it yourself, Utility Bidder will compare all of them against your usage in one conversation, and the worst outcome is discovering your current deal already stacks up.
