What is Great British Grid?
Great British Grid is a new publicly owned body within Great British Energy.
The government wants it to invest in electricity network infrastructure alongside private investors and existing network operators.
The aim is to help deliver the upgrades Britain needs as electricity demand grows and more renewable generation connects to the network.
The announcement also forms part of wider plans to improve electricity connections and introduce more competition into network infrastructure projects.
Great British Grid will not replace existing electricity network operators.
Ofgem will remain the independent energy regulator, while the National Energy System Operator, known as NESO, will continue its responsibilities for operating, planning and coordinating the electricity system.
Official announcement: gov.uk — Great British Grid announcement
Will Great British Grid reduce business electricity bills?
The government says Great British Grid is intended to help lower energy costs over time by improving infrastructure delivery and supporting investment.
However, that does not mean business electricity bills will automatically become cheaper.
There has been no general announcement cancelling existing network charges or requiring suppliers to reduce their contract prices because Great British Grid has been introduced.
The effect on an individual business will depend on future projects, network charging arrangements and the terms of its electricity supply contract.
If your business is paying an expensive variable tariff today, waiting for Great British Grid is not a substitute for checking the contract options available now.
Will Great British Grid reduce TNUoS and DUoS charges?
No automatic reduction has been announced.
TNUoS stands for Transmission Network Use of System. These charges help recover the costs of Britain's high-voltage electricity transmission network.
DUoS stands for Distribution Use of System. These charges help recover the costs of local electricity distribution networks.
Both form part of the wider costs associated with delivering electricity to businesses.
The government hopes improvements to the network and greater competition will help deliver better value over time.
But new investment also has to be funded, and future network charges depend on the relevant regulatory and charging arrangements.
Businesses should not assume that their TNUoS or DUoS charges will fall simply because Great British Grid has been announced.
Whether changes in network costs affect your invoice during an existing contract depends on the supplier and the agreed terms.
Does Great British Grid change my existing fixed energy contract?
No. The announcement does not automatically rewrite existing business electricity contracts.
If you have agreed fixed unit rates and standing charges, the terms of that particular agreement still matter.
Some fixed products protect customers against specified increases in underlying network costs.
Other contracts allow certain network or non-commodity costs to be passed through separately.
If you are comparing renewals, check exactly which costs are included and which can change during the contract.
Will Great British Grid make electricity connections quicker?
That's one of the government's main objectives.
Some businesses face lengthy waits for new electricity connections or upgrades to an existing supply.
This can affect factories, warehouses, new commercial developments, electric vehicle charging sites and other businesses with substantial electricity requirements.
The government wants Great British Grid to support faster investment in the network infrastructure needed to connect more projects.
It has also announced plans to expand opportunities for developers and businesses to arrange their own connections where appropriate.
These are planned improvements, not a guarantee that every connection will be quicker or cheaper.
Connection times will still depend on the location, available capacity, required work and the relevant network operator.
What are self-build electricity connections?
A self-build electricity connection is an arrangement where an eligible customer or developer can arrange certain connection works rather than having all of the work delivered by the incumbent network operator.
The government wants to expand these opportunities.
For some larger commercial developments, greater choice over who completes eligible work could help reduce delays.
However, not every aspect of a connection can necessarily be self-built, and technical requirements, permissions and network operator involvement still apply.
Businesses considering a new or upgraded electricity connection should confirm their options with the relevant network operator.
Great British Grid itself is not a replacement for the normal connection application process.
Is Great British Grid replacing National Grid?
No.
The government's announcement says Great British Grid will work alongside existing network operators.
It does not replace National Grid's relevant network businesses, the regional electricity distribution operators, NESO or Ofgem.
Its proposed role is to bring additional investment and competition into electricity infrastructure delivery. Existing organisations retain their respective responsibilities.
Can I switch my business electricity to Great British Grid?
No.
Great British Grid is not being introduced as a retail electricity supplier offering ordinary business tariffs.
It is intended to invest in and help deliver electricity network infrastructure.
Businesses will continue to obtain their electricity supply contracts through licensed energy suppliers.
If your current electricity contract is coming to an end, you should compare the available supplier quotations rather than wait for Great British Grid to offer a tariff.
What does Great British Grid mean for businesses with half-hourly meters?
There is no announced automatic change to half-hourly electricity billing or capacity charges.
Businesses with larger electricity connections can face costs linked to their network arrangements, available capacity and usage.
Some suppliers incorporate specified network charges into agreed contract prices, while others show or pass through certain costs separately.
Great British Grid's proposed investment role does not, by itself, remove those charges.
If your business has an expensive capacity or network charge, ask your supplier to explain its calculation and the relevant contract terms.
Should I delay renewing my electricity contract?
The Great British Grid announcement alone is not a reason to assume that electricity prices will fall before your current contract ends.
The right decision depends on your contract expiry date, current rates, available quotations and how much price certainty your business needs.
When comparing quotations, consider:
- Standing charges.
- Electricity unit rates.
- Contract duration.
- Expected annual consumption.
- Network charges included in the price.
- Any separately charged capacity or metering costs.
- Whether charges can change during the fixed term.
- The estimated annual cost.
A cheaper-looking unit rate does not always mean a cheaper overall contract.
How can The Best Energy Rates help?
The Best Energy Rates helps UK businesses compare electricity and gas contracts and understand the charges included in supplier quotations.
If you're concerned about rising network charges, we can review your existing contract and help establish which costs are fixed and which might change.
We can also compare available renewal quotations using your actual consumption and meter information.
Great British Grid is a government infrastructure initiative, not an energy supplier represented by The Best Energy Rates.
Send us your latest business electricity bill if you'd like us to review the options available.
Review your electricity contract
Upload your latest business electricity bill and we'll check your current rates, contract position and the options available to you.
Frequently asked questions
What is Great British Grid?
Great British Grid is a new publicly owned body announced by the UK government on 29 September 2026. It is intended to invest in electricity network infrastructure alongside existing operators and private investors.
Will Great British Grid make electricity cheaper?
The government aims to reduce energy costs over time, but no automatic reduction in individual business electricity bills has been announced.
When will businesses see savings from Great British Grid?
No guaranteed date or level of savings for individual businesses has been announced. Any future effect will depend on infrastructure investment, regulation and electricity market conditions.
Will TNUoS charges fall because of Great British Grid?
Not automatically. TNUoS charges are governed by existing charging arrangements, and the announcement does not establish a general reduction.
Will Great British Grid reduce DUoS charges?
No automatic DUoS reduction has been announced. Distribution charges remain subject to the relevant regulatory and network charging arrangements.
Does Great British Grid replace National Grid?
No. The government says Great British Grid will complement existing network organisations rather than replace them.
Is Great British Grid an electricity supplier?
No. Its proposed role concerns network investment and infrastructure delivery, not selling retail electricity contracts to businesses.
Can businesses switch to Great British Grid?
No. Businesses must continue arranging their electricity supply through licensed energy suppliers.
Will Great British Grid speed up commercial electricity connections?
The government intends to improve connection times through network investment and wider reforms. Individual connection times are not guaranteed.
What are self-build electricity connections?
They are arrangements allowing eligible businesses or developers to organise certain network connection works themselves through appropriate providers, subject to the relevant rules.
Will Great British Grid change existing fixed electricity contracts?
No. The announcement does not automatically alter existing contracts. The charges that can change still depend on each supplier's agreement.
Should I wait for Great British Grid before renewing my electricity contract?
Not solely because of the announcement. Compare your existing rates and current renewal offers, including network costs and the total expected annual cost.
Official sources
- UK Government — Great British Grid announcement, published 29 September 2026
- National Energy System Operator — Electricity Network Charges
- National Energy System Operator — TNUoS Charges
- Ofgem — Distribution Use of System Charges
Information checked 19 October 2026.
This is independent information from The Best Energy Rates Ltd, not an official government statement.
The announcement describes government plans and intended benefits. Future savings, connection times and tariff changes are not guaranteed.