Wilton Energy Ltd business energy supplier profile
Wilton Energy Ltd is a UK non-domestic electricity supplier serving industrial and business customers. Ofgem lists it as an electricity supply licence holder for non-domestic supply under company number 04557531, and historical Ofgem material describes it as the supplier used for top-up electricity to customers on the Wilton International site when on-site generation is not sufficient.
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Snapshot, in plain English
Is Wilton Energy Ltd right for your business?
Licensed for 23 years with accounts currently filed. Sizing detail not yet independently researched, but the Companies House profile shows an established, active licensee suitable for single-site SME and mid-market multi-site contracts. Run standard counterparty due diligence before a 3-year commitment above £250k spend.
Risk band reasoning: Active, 23 years trading, accounts current.
| Your business | Fit | Why |
|---|---|---|
| Single site SME | Fit | Often competitive on single-site fixed rates. |
| Multi-site SME | Fit | Most mid-market suppliers handle multi-site billing. |
| I&C £250k to £1m spend | Possible | Check counterparty viability over a 3-year term. |
| I&C above £1m spend | Not suited | Below the scale threshold for I&C tenders. |
Quick facts
| Trading name | Wilton Energy Ltd |
|---|---|
| Licence holder | WILTON ENERGY LTD. Parent: Wilton Energy Ltd (company no. 04557531); appears to be part of the Sembcorp / Wilton International utilities group based on Ofgem context, but no formal parent relationship was confirmed in the sources reviewed. |
| Supplies | Electricity |
| Website | Not published |
| Business phone | Not published |
| Email / contact | gbr-sol.communications@sembcorp.comContact page |
| Rate status | Quote required |
Company data
Live data on the licence-holding companies behind Wilton Energy Ltd, compiled by Purely Energy's independent research team and refreshed monthly.
Wilton Energy Ltd out-of-contract and deemed rates
Not publicly published / quote required
If you are on deemed, default, rollover, variable, or Out-of-contract rates, ask for a written renewal quote and compare it against live market prices before agreeing a new contract.
Where your p/kWh actually goes
Indicative split for a UK I&C electricity bill in 2026, sourced from Cornwall Insight's non-commodity cost research. Your meter, region and contract type shift the exact mix, but the four components are always present.
- Wholesale energy, 38%Gas or power bought on the wholesale market. The figure most coverage focuses on.
- Non-commodity costs, 53%Network charges (DUoS, TNUoS), policy levies (RO, FiT, CfD, Capacity Market), CCL and balancing costs.
- Supplier margin, 6%What the supplier earns. Always priced into the unit rate.
- Broker margin, 3%What we earn for tendering and managing the contract. Shown separately on every Purely Energy quote.
Who Wilton Energy Ltd may suit
Best suited to large industrial and multi-site business energy use, especially customers with substantial site-specific demand. Public evidence points to an industrial-site supplier rather than a mass-market SME energy brand.
Trading name and licence-holder notes
The licence holder appears to trade under the Wilton Energy name rather than a broader consumer-facing brand. Ofgem and historical documents refer to both "Wilton Energy Ltd" and "Wilton Energy Limited"; no separate consumer brand was identified.
Switching from Wilton Energy Ltd to a fixed business contract
UK businesses can switch electricity supply away from Wilton Energy Ltd once their fixed contract ends, or after resolving any open objection or termination-window issue. The process is the same for every supplier on the non-domestic market, but a few checks done in the right order make the transfer materially faster.
- 1. Find your contract end date. It's on your last renewal letter or the most recent bill from Wilton Energy Ltd. Most non-domestic contracts have a 1 to 6 month termination window before that date, outside of which you may auto-roll onto a new fixed term.
- 2. Get your MPAN ready. The 21-digit MPAN (electricity) and 6 to 10-digit MPRN (gas) uniquely identify each meter and are needed for any competing quote. Both appear on your bill.
- 3. Compare against the live market. Wilton Energy Ltd doesn't publish standard out-of-contract rates, so request a written renewal quote first and benchmark it against live market prices before agreeing anything. Purely Energy can run your meters against the wider UK panel and come back with the cheapest fixed offers.
- 4. Settle the final bill and clear any objections. Wilton Energy Ltd will issue a final bill within 6 weeks of supply transferring. If a balance is outstanding, they can object to the switch under industry rules, so clear it before the transfer date to avoid a hold.
- 5. Sign the new contract. Once the new supplier has your MPAN/MPRN and signed contract, the transfer typically completes within 4 to 8 weeks. There is no break in supply, you simply receive your first bill from the new supplier.
Need help with any of these steps? Our team handles the paperwork end-to-end as part of every quote.
Need help comparing Wilton Energy Ltd?
Purely Energy can check your current rates, compare renewal options across electricity suppliers, and review whether switching could reduce your business energy costs.
FAQs
Who supplies energy under the Wilton Energy Ltd brand?+
The Ofgem non-domestic licence is held by WILTON ENERGY LTD., ultimately part of Wilton Energy Ltd (company no. 04557531); appears to be part of the Sembcorp / Wilton International utilities group based on Ofgem context, but no formal parent relationship was confirmed in the sources reviewed.. The trading name on your bill or contract may differ from the licence holder, which is normal and reflects how UK energy is regulated.
What is the Wilton Energy Ltd business contact number?+
The official Wilton Energy Ltd contact page is https://www.wiltoninternational.com/contact/.
Does Wilton Energy Ltd publish out-of-contract rates?+
Wilton Energy Ltd does not appear to publish a standard deemed or out-of-contract rate online. Business customers should request a written renewal quote in advance of their contract end date and compare it against live market prices.
Can I switch away from Wilton Energy Ltd?+
In most cases, businesses can switch electricity supply away from Wilton Energy Ltd at the end of a fixed-term contract or after resolving any objections, debt, termination-window, or meter-data issues. The safest route is to check your contract terms, final bill position, and renewal dates before starting a transfer.
How long does it take to switch from Wilton Energy Ltd?+
Once a new supplier has the meter point details (MPAN/MPRN) and a signed contract, a non-domestic switch typically completes within 4 to 8 weeks. Supply does not break: the new supplier takes over billing on the transfer date.
Is Wilton Energy Ltd a UK-licensed supplier?+
Yes. Wilton Energy Ltd is on the Ofgem non-domestic licensee register for electricity. Ofgem maintains the official register at ofgem.gov.uk.
What are out-of-contract business energy rates?+
Out-of-contract rates are the prices a business pays when no fixed-term contract is in place with its supplier. They can be materially higher than negotiated contract rates, so businesses should check their contract end date and renewal window before they expire.
Other UK electricity suppliers
Compare Wilton Energy Ltd against these other UK non-domestic electricity licensees on the same directory.
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Or browse the full UK business energy supplier directory.
Sources
Public data this profile is built from. Always verify rate and contract details on the supplier's own website before relying on them.