Thank you, Zoe. So turning to our half year results. As ever, I'm here with Andy Agg and once we've been through our respective presentations, we'll be happy to answer your questions. It's been a really positive first half as we've continued to build on our strong foundations to deliver excellent operational and financial performance. . The investments we're making in our networks have never been more important to ensure continued resilience, enable economic growth, deliver cleaner energy and meet growing power demand. And it's these drivers that underpin the strong visibility we have in our investment program, supported by our regulators. This, in turn, gives me huge confidence in National Grid's ability to carry on delivering a compelling investment proposition with investment growth around 10% per annum and underlying earnings per share growth of 6% to 8%, whilst maintaining a strong balance sheet and delivering an inflation-protected dividend. Before I come to our performance, I want to highlight three key areas which reinforce my confidence in our ability to deliver on our plans. Firstly, the strong progress we've made in securing the supply chain to deliver record levels of investment. As you know, a big focus over the last 2 years has been to secure the supply chain for our largest suite of major projects in the U.K., the accelerated strategic transmission investment or ASTI. Today, I'm pleased to say we're in a really strong position. All 6 of our Wave 1 projects are already under construction with work progressing well. Our GBP 9 billion Great Grid Partnership covering the delivery of the 8 onshore projects within Wave 2 is now up and running with our 7 strategic partners. And we're making great progress with the remaining 3 Wave 2 offshore projects where we've completed the contracting for Sea Link and announced the preferred suppliers for Eagle 3 and 4 with contracts expected to be signed in the next few months. Once complete, we'll have secured the supply chain for all 17 ASTI projects, a significant achievement. And as a result, over 3/4 of our GBP 60 billion investment plan is now underpinned by delivery mechanisms enabling us to ramp up our capital delivery. We've invested over GBP 5 billion in the first half, another record for the group, and we remain on track to deploy over GBP 11 billion of capital investment this year, in line with our guidance. The second area to highlight is the continued momentum we're seeing from both a regulatory and policy perspective. On the regulatory front, we've built on the strong foundations we set last year in the U.S. with around 75% of our 5-year investment plan approved within our rate cases. We've also seen some important policy developments. As you know, New York State announced last year that it's likely to miss its target of 70% renewable generation by 2030. As a result, we've seen a shift in the last half towards an all-of-the-above approach when it comes to balancing clean energy goals with affordability and reliability. For example, in September, following submission of our long-term gas plan, the PSC issued an order supporting the proposed Northeast Supply Enhancement or NESE pipeline. If built, the capacity provided by the pipeline would materially enhance reliability and resilience whilst also potentially reducing energy costs for New Yorkers by up to $6 billion. In the U.K., I'll come to regulatory development shortly. But on the policy front, the government is continuing to look at different ways to support faster delivery of infrastructure and accelerate economic growth. Alongside their planning reform legislation targeted at large infrastructure projects which should support delivery of projects in the 2030s, they've also launched consultations, which include proposals to allow electricity distribution network operators to carry out simple reinforcement activities without full planning permission and a revised fast track consenting process. If implemented, this could have important benefits for future transmission projects. So it's clear we're seeing strong regulatory support for the investments we're making as well as the policy progress to assist in the delivery of future projects. And then thirdly, the near-term actions we're taking to support load growth in the U.K. We're working with the government and industry, including U.S. big tech companies, as they seek to develop the U.K.'s AI infrastructure, including the creation of data centers within AI growth zones like the recently announced ones in and Cobalts Park. These projects represent tens of billions of pounds of investment in U.K. infrastructure and are evidence of the demand growth we forecast in our RIIO-T3 business plan. which is designed to connect up to 19 gigawatts of additional demand over the 5 years to March 2031, around half of which is expected to be connecting data centers. We're now working hard to facilitate these connections, including working with the government through the AI Energy Council to support the development of more AI growth zones, so we can deliver the investment needed to meet growing energy requirements. So let me now turn to our financial performance, where we've delivered a strong set of results in the first half. On an underlying basis, that is excluding the impact of timing and exceptional items, operating profit was up 13% to GBP 2.3 billion, reflecting increased regulatory revenues across our U.S. and U.K. electricity transmission businesses. This strong operating performance drove an increase in underlying earnings per share of 6% to 29.8p. As you've already heard, our business delivered a record GBP 5.1 billion of investment, up 12% year-on-year at constant currency. And in line with the policy, the Board has declared an interim dividend of 16.35p per share. Turning next to reliability and safety. I'm pleased to say reliability has remained strong across our U.K. and U.S. networks over the first half of the year. As we look ahead to the winter we're well prepared with winter readiness plans in place. The NESO recently published its winter outlook report for the U.K., in which they forecast electricity margins around 10%, the highest since 2019. In the U.S., whilst we anticipate adequate electricity margins, gas availability across the coldest days of winter remain a focus, especially in extreme weather events, and so our teams will work closely with upstream suppliers to mitigate any risks. And in July, the NESO published its report investigating the outage following the fire at our North Hyde substation and we're working closely with the government, NESO, Ofgem and industry to progress the report's recommendations. Safety, as always, remains a critical focus across our business. In the last 6 months, our lost time injury frequency rate was 0.09, inside our group target. We continue to promote a culture of safety excellence including, for example, identifying new ways to enhance our safety protocols, such as the use of digital job briefs to increase hazard recognition in the field. Moving now to our operating performance across the group, starting with Electricity Distribution. Capital investment increased by 17% and to GBP 756 million, reflecting increased asset replacement and load-related reinforcement activity. I'm pleased to say that we've now delivered over GBP 100 million of synergy savings, 6 months ahead of target following the U.K. electricity distribution acquisition in 2021. These synergies have been achieved through smarter procurement, operational efficiencies across our shared sites and integration of support functions in the group. In October, we also saw the publication of Ofgem's sector-specific methodology consultation for RIIO-ED3, which builds on the foundations of the T3 framework. We welcome the fact that Ofgem has directed networks to use a long-term planning horizon. This will ensure that delivery of the next price control also takes into account investment drivers in the decades ahead. including load growth, asset health, resilience and renewable generation. We've also made good progress on connections reform, including preparing flexible offers to customers that are likely to secure a cue position. This allows them to progress their projects ahead of a formal offer, enabling faster connections for renewables and low-carbon technologies. And finally, we continue to build our system -- our distribution system operator capabilities with the launch of the demand turner flexibility market, incentivizing increased demand as an alternative to curtailing generation. Moving to U.K. Electricity Transmission, where capital investment increased by 31% to GBP 1.7 billion, including construction of new substations to support load growth and progress on our GBP 1 billion London Power Tunnels project where we've now energized the first 2.5 kilometers during substation and. We've also been working hard to find innovative ways to expand system capacity. For example, we began work on a new substation in Uxbridge Moor, West London, with an innovative design, which will have a 70% smaller footprint and avoids the use of SF6, a potent greenhouse gas. This substation will support over a dozen new data centers and is expected to deliver 1.8 gigawatts of new capacity equivalent to powering a mid-sized city. We've also leveraged the approach to procurement frameworks using our strategic infrastructure business, including, for example, in July, when we signed an GBP 8 billion electricity transmission partnership with 7 regional partners to deliver substation infrastructure across the U.K. transmission network. Turning to policy. We're working closely with NESO and customers to support connections reform. Once NESO publishes this updated queue, we'll have a clear view of the sequencing of the specific projects required, and we can then turn our efforts to meeting these connection dates at pace. On regulation, Ofgem published its draft determination for the RIIO-T3 framework in early July, with our response published in late August. This included changes we believe are needed to the baseline return and the incentive framework to allow high-performing networks to achieve a globally competitive overall return. We've also proposed a number of refinements to streamline our funding mechanisms, enable us to recover the efficient cost of our investments and progress projects at a pace expected by our stakeholders. As you'd expect, we've engaged heavily with Ofgem at all levels of the organization ahead of the final determination, which is expected in early December. And we expect to take a decision in late February or early March following the license drafting process. Turning now to strategic infrastructure. As you've heard, our focus has been to ramp up delivery of the Wave 1 ASTI projects, whilst also ensuring we're securing the supply chain and relevant consents for Wave 2. specifically on our Wave 1 projects, examples of our progress include our offshore Eagle 1 and 2 projects where the cable manufacturing and site works for the southern converter stations are underway, our onshore Yorkshire Green upgrade project where the last of 8 200-ton transformers has now been delivered and the North London Reinforcement project where we finished reconducting 3 circuits, installing over 190 kilometers of cables. We've also completed 4 public consultations this year, including the submission of 2 major development consent order applications, Sea Link and Norwich to Tilbury, with both submissions now accepted by the planning inspectorate, a major milestone. On the regulatory front, we continue to engage with Ofgem to find a resolution to our request for a delay event on the Eagle 1 project and are encouraged by the discussions to date. We expect these negotiations to reach a final decision over the next few months. Coming to the U.S. and starting with New York, where we've continued to make strong progress across our operations. Capital investment reached GBP 1.6 billion, up 5%, driven by an increase in mains replacement expenditure. In addition, we've continued to make strong progress on our $4 billion upstate upgrade, including our Smart Path Connect transmission project, where our segment is on track to be ready to energize at the end of the year and our Climate Leadership and Community Protection Act, or CLCPA Phase 1 and 2 projects, where we expect the first round of permit approvals for the end of the calendar year. On the regulatory and policy front, in addition to the order from the PSC on the NESE pipeline and the approval of the Niagara Mohawk joint proposal, we're also engaging on the draft New York State Energy Plan. Released earlier this year, the plan outlines long-term strategies to meet New York's energy needs. It emphasizes the importance of infrastructure investment and recognizes the enduring role of the gas network in maintaining reliability, affordability and security of supply. Once finalized later this year, the plan will influence future regulatory decisions and utility planning across the state. In New England, capital investment increased by 23% to GBP 1 billion, reflecting increased spend on asset condition and system capacity in both electricity transmission and distribution, 220,000 smart meter installations and the further rollout of our fault location isolation and service restoration program. We've also agreed partners for our strategic procurement framework which will support over $3 billion of contracts over the next 5 years. And finally, on regulation and policy, we've agreed around $600 million of allowances under the Electric Sector Modernization Plan largely focused on electric vehicle highway charging and IT infrastructure, and we're continuing to work with the governor's office to advance the Energy Affordability Bill. Moving to National Grid Ventures. Capital investment was GBP 69 million, supporting asset refurbishment across our Interconnector and U.S. Generation portfolios. Operationally, we've had a strong 6 months with our Interconnector fleet at 90% availability and our Generation fleet achieving 96% reliability. We've also progressed the Propel transmission project through our Transco joint venture, where EPC contracts are now under development. Once complete, the project will help to deliver power from Long Island to the Bronx in New York City and Westchester County. We've also streamlined our portfolio, having completed the sale of National Renewables in May and announced the sale of Grain LNG in August. With all regulatory approvals received, we expect completion in the coming weeks. So let me stop there and hand over to Andy to walk you through the numbers before I come back to talk about our priorities for the second half. Andy?