UK non-domestic supplier profile

The Nuclear Decommissioning Authority business energy supplier profile

The Nuclear Decommissioning Authority is a UK public body focused on cleaning up the country’s former nuclear sites. It also appears on Ofgem’s public licensee lists as a non-domestic electricity supplier and gas supplier, but no public business tariff or deemed-rate schedule was found in the sources reviewed.

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Last updated 16 May 2026 · Talk to our team on 0161 521 3400

Snapshot, in plain English

Is The Nuclear Decommissioning Authority right for your business?

Sizing pending

Independent sizing not yet published. See the Companies House Quick Look below for the licensed entity's basic details.

Your business	Fit	Why
Single site SME	Possible	Confirm with our team before relying on this supplier.
Multi-site SME	Possible	Independent sizing not yet published.
I&C £250k to £1m spend	Possible	Independent sizing not yet published.
I&C above £1m spend	Possible	Independent sizing not yet published.

Verify on Companies House (free public record)

Quick facts

Trading name	The Nuclear Decommissioning Authority
Licence holder	THE NUCLEAR DECOMMISSIONING AUTHORITY Parent: The Nuclear Decommissioning Authority (executive non-departmental public body sponsored by the Department for Energy Security and Net Zero) Co. none
Supplies	Gas and Electricity
Website	nda.gov.uk
Business phone	01925 802077
Email / contact	enquiries@nda.gov.uk Contact page
Rate status	Quote required

Company data

Live data on the licence-holding companies behind The Nuclear Decommissioning Authority, compiled by Purely Energy's independent research team and refreshed monthly.

Independent research on The Nuclear Decommissioning Authorityhasn't been published yet. Our monthly refresh will publish it at the next run.

The Nuclear Decommissioning Authority 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 The Nuclear Decommissioning Authority may suit

Likely not a mainstream commercial SME supplier. Public evidence shows NDA is licensed for non-domestic supply, but it does not appear to market a standard business supply proposition with published rates; business buyers should expect direct engagement and quote-based procurement rather than self-serve signup.

Trading name and licence-holder notes

The licence holder appears to trade primarily under its own statutory name, The Nuclear Decommissioning Authority. Ofgem lists company number as 'none' for its electricity and gas supply-related licences, which suggests the supplier identity is a public body rather than a conventional incorporated retail energy brand.

Switching from The Nuclear Decommissioning Authority to a fixed business contract

UK businesses can switch gas and electricity supply away from The Nuclear Decommissioning Authority 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 The Nuclear Decommissioning Authority. 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 and MPRN 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. The Nuclear Decommissioning Authority 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. The Nuclear Decommissioning Authority 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 The Nuclear Decommissioning Authority?

Purely Energy can check your current rates, compare renewal options across gas and electricity suppliers, and review whether switching could reduce your business energy costs.

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FAQs

Who supplies energy under the The Nuclear Decommissioning Authority brand?+

The Nuclear Decommissioning Authority holds the relevant Ofgem non-domestic licence directly. Your bill, contract, and customer-service contact details will all reference The Nuclear Decommissioning Authority.

What is the The Nuclear Decommissioning Authority business contact number?+

The Nuclear Decommissioning Authority can be reached on 01925 802077 or by email at enquiries@nda.gov.uk. The official contact page is https://ukinventory.nda.gov.uk/contact-us/.

Does The Nuclear Decommissioning Authority publish out-of-contract rates?+

The Nuclear Decommissioning Authority 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 The Nuclear Decommissioning Authority?+

In most cases, businesses can switch gas and electricity supply away from The Nuclear Decommissioning Authority 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 The Nuclear Decommissioning Authority?+

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 The Nuclear Decommissioning Authority a UK-licensed supplier?+

Yes. The Nuclear Decommissioning Authority is on the Ofgem non-domestic licensee register for both gas and 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 gas and electricity suppliers

Compare The Nuclear Decommissioning Authority against these other UK non-domestic gas and electricity licensees on the same directory.

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.