Why The Grid Matters for the Energy Transition
The UK’s electricity grid, which transports power across the country, is a key barrier to the energy transition. Wind, solar and BESS lead the clean energy technologies being deployed globally, but being able to transport this power and manage demand on the grid is holding back renewable projects being deployed. As economies shift from fossil fuels to renewables, electric vehicles and heat pumps, demand for electricity is rising sharply. Without sufficient grid capacity, developers cannot connect new projects, and clean power gets “curtailed” (switched off), raising electricity prices during periods where the supply demand mismatch can’t be fixed.
For energy developers, grid access is now often the single biggest bottleneck to bringing a project online, ahead of financing or planning permission. Long connection queues, ageing infrastructure and slow permitting have left thousands of renewable and storage projects waiting years for a grid slot. As a result, grid policy, investment and reform have become as commercially critical as the generation technology itself, shaping which projects get built, when, and where.
What's Happening in the UK
The UK has become a leader in large-scale grid reform, piloting schemes to speed up renewable adoption to meet their ambitious 2030 decarbonised grid target. Ofgem (the UK energy regulator) has approved £28.1 billion of upfront network investment under “RIIO-3” (its five-year price control framework running April 2026 to March 2031), rising to an estimated £90 billion by 2031 across gas and electricity networks. Of this, £10.3 billion is earmarked for electricity transmission specifically, described as the biggest expansion of the grid since the 1960s.
Alongside funding, the National Energy System Operator (NESO, which manages Britain's electricity system) has delivered what it calls the biggest reform of the grid connections process to date. On 8 December 2025, NESO confirmed a new “delivery pipeline” that replaces the old first-come-first-served queueing system with a “first ready and needed, first connected” model, unlocking up to £40 billion of investment a year. This addresses a queue that had ballooned past 800GW, far exceeding what’s needed to meet UK net zero targets. Projects are now sorted into Gate 2 (ready, land secured, planning progress) or Gate 1 (not yet ready), with Gate 2 projects offered connection agreements aligned to 2030 or 2035 delivery phases.
Ofgem is also pushing a “connections end-to-end” reform package, proposing enforceable licence conditions, financial penalties for network operators that miss delivery milestones, and mandatory real-time publication of grid capacity and queue data so developers can plan with more certainty. Meanwhile, the new connections pipeline will be made up of 283GW of generation and storage capacity as well as 99GW of transmission-connected demand, giving a sense of the scale of activity that will be moving through the system.
Recent news also highlights Britains grid build-out, which will be the greatest expansion since the 1960s. The National Energy System Operator (NESO, Great Britain’s strategic energy planner) estimates that approximately £64 billion will be required for transmission projects by 2030, followed by a further £89 billion during the 2030s. This would take planned investment beyond £150 billion and require five times more infrastructure to be built by 2030 than during the previous three decades, according to the Guardian.
By 2041, the program could add 4,200 miles of new onshore and offshore power lines while upgrading to another 2,200 miles. More than 80 transmission projects are considered necessary to accommodate renewable generation, meet rising electricity demand and reduce constraint costs (payments incurred when network congestion prevents available generation from reaching consumers).
What appears to set the UK apart is their leadership in restricting the connections process, which has been introduced to meet their power decarbonisation target. Alongside this, Transmission operators have pledged significant funding upgrades to connect renewables and reinforce the grid. National Grid has pledged up to £35bn between April 2026 and March 2031. SSEN Transmission has also submitted a £22bn+ business plan for RIIO-T3. Together, this will offer the UK a competitive advantage as a market for renewable projects and we expect this will unlock significant growth over the next few years if these policies and funding measures are successfully implemented.
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