At a Glance
Business water bills in England and Wales are set to rise in 2026–27 as PR24 investment plans move into delivery.
Ofwat has opened consultations on adding five major schemes to the PR24 large schemes gated process and on a new approach to capital maintenance allowances ahead of PR29.
The UK Government’s “A new vision for water” White Paper confirms £16 billion of near-term storm overflow and phosphorus investment and signals a future move to a single economic and environmental regulator.
The Environment Agency is working to clear a backlog of pollution enforcement cases by April 2026 against a backdrop of rising serious incidents and storm overflow spill hours.
Major new reservoir and transfer schemes across southern and eastern England are being positioned to close a forecast 4–5 billion litre per day supply gap by 2050.
The UN World Water Development Report 2026 underlines intensifying climate-driven water scarcity and growing inequalities in access, reinforcing the need for integrated planning.
This week in water: UK regulatory activity around PR24 and future price controls is crystallising into higher bills, tighter expectations on asset management, and accelerated infrastructure planning. At the same time, government policy is signalling structural changes to the regulatory landscape and an enforcement push on pollution and storm overflows. Globally, climate-driven scarcity and equity concerns are being framed more explicitly as system-wide water risks. Here’s what matters, and why.
Ongoing Stories
Continuing developments this week on PR24 delivery and major schemes: Ofwat’s consultation to add five schemes to the PR24 large schemes gated process builds on the existing £104 billion PR24 investment programme and indicates closer scrutiny of high-value infrastructure before funding is fully released.
Following earlier coverage of UK regulatory reforms: The updated “A new vision for water” White Paper provides further detail on investment allocations, enforcement backlogs, and the proposed replacement of Ofwat with a single integrated regulator for England and Wales, clarifying the direction of future governance changes.
Wastewater enforcement pressures progress with new detail: The Environment Agency’s commitment to resolve all pre‑2022 pollution cases by April 2026, alongside data on increased storm overflow spill hours and serious incidents, confirms a tightening enforcement environment for wastewater operators previously flagged in earlier issues.
Service resilience issues at South East Water remain under active scrutiny: Ofwat’s ongoing investigation into late‑2025 supply outages, including the major Tunbridge Wells incident, continues without resolution and keeps operational resilience and contingency planning under regulatory focus.
Strategic resource schemes advance as part of long‑term supply planning: New detail on reservoirs at Havant Thicket, the Fens, Broad Oak, Arlington and the South East Strategic Reservoir Option reinforces the long‑term supply-demand gap previously reported, with schemes now explicitly framed against a 4–5 billion litre per day 2050 shortfall.
Key Developments – UK
Business water bills to rise in 2026–27 under PR24 investment plans
Water bills for businesses in England and Wales are expected to increase in 2026–27 as Ofwat’s PR24 price review moves into the next charging period. PR24 includes around £104 billion of investment to 2030, targeting a 17% leakage reduction, a 45% cut in storm overflow spills compared with 2021, installation of 10 million smart meters, and delivery of nine new reservoirs and transfer schemes. For non-household customers, this links cost increases directly to large-scale resilience and quality improvements. The practical implication is that business users should factor higher water costs into medium-term operating budgets while engaging early on metering, demand management and resilience opportunities tied to these programmes. (Source: World Kinect)
Government White Paper sets out “A new vision for water” and signals future single regulator
The UK Government’s White Paper confirms £11 billion over five years to improve 2,500 storm overflows and a further £5 billion for phosphorus removal in wastewater treatment. It commits to clearing the Environment Agency’s enforcement backlog of pollution cases from 2021 and earlier by April 2026 and establishes a new Water Ombudsman with binding powers, alongside increased funding for catchment partnerships. The Paper also proposes replacing Ofwat with a single integrated water regulator for England and Wales in future reforms, combining economic and environmental oversight. This sets a clear trajectory for stronger enforcement, more formalised customer redress, and a reconfigured regulatory architecture that utilities and investors will need to factor into compliance strategies and governance planning. (Source: UK Government)
Environment Agency targets storm overflow enforcement backlog as incidents rise
Using data referenced in the White Paper, the Environment Agency reports 3.61 million storm overflow spill hours and a 60% increase in serious environmental incidents in 2024 compared with 2023. It has committed to resolving the backlog of enforcement cases from 2021 and earlier by April 2026, indicating a sharper focus on progressing investigations and sanctions. This escalation means wastewater operators face higher near-term enforcement and reputational risk, reinforcing the need to prioritise compliance upgrades and data quality around discharges. (Ongoing story; Source: Environment Agency / UK Government)
Ofwat opens consultation on adding five schemes to PR24 large schemes gated process
Ofwat has launched a consultation on bringing five additional major infrastructure schemes into the PR24 large schemes gated process, following a decision by the Competition and Markets Authority. The gated framework subjects high‑value projects to staged approvals, with funding, deliverability and need tested at each gate. This development signals stricter front‑end challenge for large schemes, implying that promoters and delivery partners will need more robust business cases, risk assessments and evidence of benefits to secure timely funding approval. (Ongoing story; Source: Water Magazine)
Ofwat proposes new approach to capital maintenance allowances ahead of PR29
In a separate consultation, Ofwat has set out proposals to change how capital maintenance allowances are determined for the PR29 price review. The aim is to incentivise improved asset management and investment efficiency, potentially reshaping the balance between maintenance and enhancement spend in company plans. For utilities, this is an early signal that future cost recovery for maintaining ageing networks will depend more heavily on demonstrable asset health, resilience planning and performance evidence. (Source: Water Magazine)
Major reservoir schemes positioned to address 2050 supply gap
Industry updates highlight that the UK faces a projected water supply deficit of 4–5 billion litres per day by 2050 due to climate change and historic underinvestment. To address this, utilities and partners are progressing a portfolio of major schemes including Havant Thicket reservoir (serving around 160,000 residents), new Fens reservoirs (supporting approximately 250,000 homes), the South East Strategic Reservoir Option (SESRO) in Oxfordshire for the 2040s, and new or expanded reservoirs at Broad Oak in Kent and Arlington in East Sussex, within a wider £44 billion infrastructure programme. These projects, which would roughly quadruple typical capital investment levels, are central to long‑term drought resilience and growth capacity, but also increase planning, consenting and delivery risk across affected regions. (Ongoing story; Sources: GHD; EiB Group)
South East Water outages remain under Ofwat investigation
Ofwat’s investigation into South East Water’s supply outages, including a significant incident affecting the Tunbridge Wells area in late 2025, continues into early 2026. The outages exposed vulnerabilities in local supply resilience, with prolonged customer disruption and questions over contingency planning. The open investigation keeps pressure on the company’s operational performance and may shape future regulatory expectations on resilience standards and incident preparedness in similar at‑risk areas. (Ongoing story; Source: Regulator and utility reports)
Key Developments – Worldwide
UN World Water Development Report 2026 stresses climate-driven scarcity and equity
Globally, the UN World Water Development Report 2026 highlights intensifying climate change impacts on water scarcity and growing inequalities in access driven by droughts, extreme events and degraded resources. The report calls for stronger integrated water resources management, improved governance and expanded climate adaptation measures to reduce vulnerability, particularly for marginalised communities. For utilities, regulators and investors beyond the UN system, the report reinforces that physical climate risk and water equity are converging into a core planning constraint, with expectations for integrated, basin‑scale approaches likely to increase. (Source: UN Water)
Regional collaboration on resilience across UK and Ireland
While centred on the UK and Ireland, recent industry releases emphasise cross‑jurisdiction collaboration on reservoir development and 2050 climate resilience planning, including progress in Scotland and Northern Ireland. Programmes are aligning infrastructure delivery with national climate adaptation targets and shared learning on drought, flooding and service continuity. This regional coordination illustrates how neighbouring jurisdictions with distinct governance frameworks are converging on similar resilience approaches, offering transferable models for other multi‑jurisdictional basins. (Source: EiB Group)
Signals to Watch
How Ofwat’s large schemes and capital maintenance consultations are reflected in draft PR29 methodologies and company asset strategies over the next 12–24 months.
Progress against the Environment Agency’s April 2026 enforcement backlog target, and whether incident and spill trends begin to stabilise or continue rising.
Planning and consenting timelines for major reservoir and transfer schemes, particularly where local environmental or land‑use conflicts emerge against 2050 supply gap pressures.
Weekly Water tracks the decisions shaping water systems — not the noise around them.
If this was useful, feel free to share it with colleagues working on real delivery, regulation, and investment challenges.