Minimum information requirements for Demand connections ≥5MVA: what’s changing and what it means for you
To help us assess applications and progress viable projects sooner, we’ve updated the minimum information we need at the point of application to connect to our Distribution Network.
What’s changing for demand applications ≥5MVA
If your total requested import capacity is 5MVA or above, we now require additional minimum information at the point of application to demonstrate project readiness and reduce delays caused by incomplete submissions.
What this means in practice
When you apply for a demand connection ≥5MVA, you should be ready to provide the usual core minimum information requirements.
From 1 June 2026, you will also be required to submit the following:
- Letter of Authority (LoA) — if you are applying or acting on behalf of another party.
- Heads of Terms (HoT) — if you and/or the connecting customer are not the existing landowner/leaseholder of the site (to confirm land arrangements for the site).
- Site Plan — at an appropriate scale showing the site boundary, the expected/proposed substation areas, buildings, roads etc.
- Single Line Diagram (SLD) — for demand ≥5MVA this is required only where customer-owned equipment is likely to cause disturbance (e.g. large motors/pumps/chillers, UPS/inverters, high-power EV equipment).
- Preliminary Project Timeline — a short timeline showing key milestones to demonstrate that the requested connection date is credible.
Where can I find out more?
The full set of minimum information requirements and what you need to submit are set out in the following documents:
Nationwide Requirements & Supporting Guidance
Minimum information requirements apply across all UK Distribution Network Operators. The Energy Networks Association (ENA) has published guidance to help customers understand what’s required.
What happens if information is missing?
If essential minimum information is missing, we may need to contact you for clarification before we can progress your request. Providing the correct information up front helps reduce avoidable delays.
Why are the minimum information requirements changing?
Demand connection applications have increased significantly in recent years, and Ofgem has asked network operators to strengthen entry requirements to ensure the demand queue is made up of viable, well‑progressed projects.
Ofgem has therefore updated the minimum information expectations reflected in its Regulatory Instructions and Guidance (RIGs).
Who do I contact for more information?
We are here to help if you have any questions about your project. To find the most relevant contact for your question, visit our Contact Connections page.