Ofgem’s grid connection reform - timeline, breakdown and industry view

 In March 2025, market participants were still in limbo, waiting for concrete guidance on how the "first ready, first connected" principle would move on from policy ambition into operational reality. At the time, there was more speculation than substance. The planning and infrastructure bill introduced that month hinted at major changes, but with the grid application process paused and implementation details scarce, the industry was left with mounting questions. Fast forward to June 2025: while not all uncertainty has been resolved, the contours of the new regime are beginning to emerge. Ofgem’s formal approval of the connections reform package, also known as Target Model Option 4+ (TMO4+), on 15 April, alongside NESO’s publication of the transmission connections timeline this month, suggests the fog is finally beginning to lift. inspiratia breaks down what this means in practice.