HomeGB EnergyCross-cuttingElectricityGasOil and upstreamHydrogenHeatNuclearCCUSInterconnectors

Governance scenario

Connection Queue Reform

Queue volume, milestone discipline, and delivery sequencing remain central issues as Ofgem and NESO continue implementing TMO4+ and wider connections reform. DNOs want credible demand signals, while developers remain sensitive to queue reprioritisation and implementation timing.

Back to scenarios

This is a fictionalised teaching scenario grounded in real institutional roles, published reforms, and current public-source context.

Scenario player

Work through the decision path below. Each choice changes the route, the institutional trade-offs, and the metrics the scenario tracks.

Connection Queue Reform

Step 1 of 2

Ofgem

The queue has become the constraint

Queue volume and lead times remain a structural constraint. Ofgem reports demand contracted offers rising from 41 GW in November 2024 to 125 GW in June 2025, while NESO's reform materials report 381.5 GW of ready-to-build generation and storage unlocked through queue reform. Protected-offer windows and Gate 2 offers are still being sequenced through the current implementation window, and developers, networks, and government all want clearer signals on what counts as ready and needed.

What is at stake

  • -If you do nothing, net zero targets are at risk.
  • -If you reset queue positions, you face legal challenges from those who invested based on current rules.
  • -If you force build-out of all queued capacity, consumer bills rise dramatically.

What reform approach do you propose?

Current Metrics

System Security68
Affordability55
Net Zero Progress45
Customer Protection60
Operational Efficiency50
Stakeholder Trust48

Actors Involved

OfgemNESONGEDGeneratorsDESNZ

Regulatory Context

Connections Reform: TMO4+ and distribution demand reform, verified against March 2026 implementation updates

Governance relationship map

View mode

Operating loop breadcrumb

Governance→Planning→Operations→Outcomes→Evidence

Current focus: Rules and accountability

Legend

Governance and policy

Rules, remits, and accountability

Planning and investment

Connections, queue progression, and delivery planning

System operations

Real-time balancing and network operation

Market and consumer outcomes

Prices, settlement, reliability, affordability

Evidence and learning

Telemetry, assurance, and continuous improvement

Glossary

  • Dispatch

    Real-time instructions to increase or reduce generation or demand so supply stays in balance.

  • Balancing

    The continuous process of matching electricity supply to demand while maintaining system frequency.

  • Constraint

    A technical limit in the network that restricts how power can flow under current conditions.

  • Industry code

    A formal rulebook that defines obligations and processes for specific market and network activities.

  • Connection agreement

    The formal agreement setting technical and milestone conditions for connecting a project to the network.

  • Settlement

    The process that turns metered and contractual positions into final market cashflow outcomes.

  • Conformance gate

    A quality checkpoint that verifies whether data or implementation meets agreed standards.

  • LTDS

    Long Term Development Statement publication requirements for distribution network data.

Guided tour

Step 1 of 8

Who sets the rules?

Start with governance: policy direction, regulatory oversight, licences, and code obligations.

Why it matters: Newcomers should first understand where authority sits before interpreting operational decisions.

Open Ofgem licence and code guidance

Preparing system graph…

Use this map to keep scenario decisions anchored to policy, coordination, operational delivery, and evidence feedback relationships.

Sources and methodology

How this page was assembled

Scenarios are designed as regulator-safe teaching runs. Institutional roles, programme context, and cited reform pathways stay grounded in current public sources, while event details and numbers inside the run remain fictionalised unless explicitly evidenced elsewhere. This scenario is framed against Connections Reform: TMO4+ and distribution demand reform, verified against March 2026 implementation updates.

Last reviewed 18 March 2026

Primary sources

Ransford's Notes