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The Gate 2 evidence submission window has been extended following an announcement from NESO on Friday (25th July). All projects will now have up until at least the 18th August to submit their Gate 2 evidence to NESO or their relevant DNO. The Story So FarThe DNO evidence submission window has been open since 20th May 2025. This was followed by the NESO submission window which opened on the 8th July, with both windows originally due to close on 29th July. However, on 16th July NESO announced that it would be extending the evidence submission window by a further 5 working days due to a significant number of problems faced by users attempting to submit evidence through the NESO portal. On Friday last week (25th July) NESO announced that the submission window is to be further extended. NESO intend to provide notice of the window closure 10 working days in

In future energy systems, the optimal operation of integrated energy networks – electrical, blended natural gas and hydrogen, pure hydrogen and heat – will require much greater coordination between them, including through storage import and export decisions and power to gas (P2G) plant actions. The feedback loop created by the widespread power-to-gas and gas-to-power will add substantial complexity to system operation.   Many current power-to-gas models adopt certain simplifications to remain manageable. These often involve using broader time or location scales, assuming predictable outcomes, and modelling markets in an idealised way.  But these trade-offs come at a cost. They risk underestimating the complexity of operating integrated energy systems, the assets required, and the investment needed.  For example, models may ignore short-term forecast errors, assume perfect foresight, or drop critical constraints like total energy budgets.  This can lead to inefficient infrastructure planning and operational decisions that compromise energy security or inflate consumer

Since the launch of NESO’s ESR tender in 2022, TNEI has assessed the capability of over 3.9GW of transmission and distribution connected assets to support in restoration service provision. The 19th of May 2025 ITT2 submission deadline for the South West & Midlands ESR tender marked the end of NESO’s first set of tenders for system restoration. TNEI has supported ten clients through all stages of the ESR tender process in the South East, Northern, and South West & Midlands tenders. We used our expertise to provide technical advice to our clients and perform technical studies in assessing the capability of their sites to meet the requirements of the different ESR services – Primary, Top-Up, Anchor (DR) and Top-Up (DR). Client Feedback The following is just some of the positive feedback we received from our clients in supporting them with their technical submissions: “We wanted to thank you and your

Sarah Sheehy, Rosemary Tawn, Mohamed Galeela and Nathanael Sims recently attended CIRED 2025 in Geneva bringing together contributors from across the globe, including utilities, manufacturers, academia, and innovators, to share insights and advancements in the planning and operation of distribution networks. The event offered a packed programme of presentations, poster sessions, and roundtables covering six core themes: network components; power quality and safety; operation; protection, control and automation; distribution system planning; and the evolving role of customers and regulation. Topics ranged from the integration of inverter-based resources and flexibility markets, to challenges in cyber security, data driven asset management, and evolving regulatory frameworks for DSOs. TNEI made several active contributions to the conference. Sarah Sheehy presented work from the ongoing Community DSO project with Northern Powergrid, which focuses on coordinating flexibility from local energy communities to manage low voltage network constraints. The approach combines real GIS-based network modelling with a flexibility coordinator to assess how

Cathal Ó Murchú and Nilanga Jayawarna recently attended the Global Offshore Wind Conference 2025, organised by RenewableUK at the Excel London conference centre. The two day conference brought together the offshore industry from around the world, with talks held on five different stages on a wide variety of topics related to Offshore Wind Farms. The entirety of the supply chain was represented from vessel licensees to cable installers to floating turbine anchor chain stress reducers. Of particular interest were the governmental keynotes and roundtable discussions which covered the industry goals and targets to the most urgent and pressing needs. These included job creation, skills transferability, potential investment opportunities and known bottlenecks in the supply chain. During government keynotes, multiple billions of pounds of investment was assured for the industry. At least 55GW of offshore potential was referenced between Scotland, Wales and Northern Ireland in the coming decades. Notably absent from

The transmission network in the Dublin metro area has always been known to experience high short circuit currents. The rapid expansion of electricity demand and generation connections in Dublin has led to increased short-circuit fault levels, presenting significant safety concerns. As a result, both operational measures and infrastructure enhancements are required to manage these risks. EirGrid planners and operators use various strategies to minimise the risk of high short circuit currents – such as investment in technologies and substation sectionalising. EirGrid advises generator developers to thoroughly assess their connection strategies to avoid short-circuit constraints that may impact project timelines or viability. The EirGrid Grid Code specifies the short circuit current requirements for the Ireland transmission system. The Grid Code | The Grid | EirGrid The recent EirGrid short circuit memo outlines the challenges for generators connecting to the transmission network in the Dublin metro area Short-Circuit-Summary-for-Industry-27032025.pdf Are you concerned that