Joseph Lewis
June 2025

Is our approach to water about to get systemic?

A view of Humber Bridge from above

Joseph LewisJoseph Lewis is Policy Lead at the Institution of Environmental Sciences, working to promote the use of the environmental sciences in decision making. Joseph leads the delivery of the IES Policy Programme, standing up for the voice of science, scientists, and the natural world in policy.

Joseph has ten years of experience in public policy, including in Parliament and the charity sector. He is particularly passionate about science communication and the role it can play in shaping environmental decisions.


At the start of June, the UK’s Independent Water Commission published its interim report, following a call for evidence earlier in the year that received more than 50,000 responses.

This interim report is a critical step in the ‘Cunliffe Review’, which is assessing the water sector regulatory system for England and Wales. With clear evidence of unfavourable environmental and social outcomes over recent years, the Commission will need to determine whether the regulatory system itself needs to change, and how it can better secure outcomes for people, the economy, and the environment. 

From the outset, the Commission has been seeking to provide recommendations amounting to a ‘fundamental reset’ of the water sector. This interim report sets out initial findings, with a final report due to be released over the summer.

For an early look at the review and what it means for the environment, see our Essential Environment coverage from March. For an IES perspective on the review so far, see the IES and FWR response to the Commission’s call for evidence.

What does the interim report say?

The interim report focuses on the same five core themes as the call for evidence:

  • strategic direction and planning
  • legislative framework
  • regulatory reform
  • company structures, ownership, governance and management
  • infrastructure and asset health

The most important aspect of the interim report is the recognition of the need for a wider systemic approach to water, exemplified in the report’s statement that “there is no simple, single change, no matter how radical, that will deliver the fundamental ‘reset’ of the water sector that is the governments’ objective.” 

Other aspects of the interim report examine:

For full details of the Commission’s findings so far, see the interim report.

How have the experts responded?

IES members and committee members have responded to the latest developments:

This interim report is a great insight into the Commission’s current thinking. It offers an initial perspective on a more systemic approach to tackling water, which would be welcome in light of the increasingly ‘wicked’ problems facing the sector.

This is only part of a wider policy process, but eventually outcomes will depend on the work of practitioners, who must be ready to deliver. This interim report should be viewed as a vindication of the choice by environmental professionals to develop systemic, multidisciplinary approaches, which will be critical to implementing system planning in practice.

- Gary Kass, Chair of the IES External Policy Advisory Committee, IES Vice President

The Independent Water Commission’s call for a regional ‘systems planning’ approach highlights the critical need to move beyond siloed decision-making. Evidence from our recent collaborative work with the Environment Agency and Mott MacDonald team demonstrates that coordinated, systems-based planning, integrating water resources, quality, and high flows management, can support the design of multifunctional interventions with co-benefits across sectors. 

Such an approach improves planning effectiveness, enhances system resilience, and enables better alignment with local development and environmental priorities. Integrated modelling tools such as WSIMOD are essential to underpin this process, providing the systems-level evidence required for collaborative and transparent decision-making.”

- Ana Mijic, Professor of Water Systems Integration, Imperial College London

What does it mean for you?

While this interim report is an important milestone, setting out a clear indication of the Commission’s perspective so far, we are still several steps away from seeing the full implications for environmental professionals.

Over the summer, the Commission is expected to produce a final report, which will set out recommendations. Ultimately, the Welsh Government and the UK Government will need to decide whether or not to adopt the recommendations in Wales and England respectively. They also need to decide how to implement the recommendations, as the Commission is likely to leave a degree of discretion around the more strategic and political questions.

For water professionals, the immediate implication is that systemic change is on the horizon. Professionals should get ‘upstream’ of these developments by considering how they can embed multidisciplinary approaches and how tools such as WSIMOD can help them to prepare for a strategic shift. We should also be considering how we can seize the opportunity of systemic and catchment-based approaches to secure co-benefits and shared outcomes for people, the economy, and the environment.

What are we doing about it?

The Foundation for Water Research (FWR) is a key part of the IES family, working to champion a systems approach to ensure that water solutions are holistic and multifunctional. The research and work of the FWR will be crucial to delivering on these latest calls for a long-term systems approach to water.

In the last week, Patric Bulmer has written a timely analysis piece for the FWR website on water resources management and infrastructure, looking at ‘the challenges and the future’.

Get involved: if you want to support the work of the IES to stand up for science and nature, become an affiliate member, or if you’re an environmental professional, join the IES. If you want to find out more about environmental policy or the training we offer for members, please contact Joseph Lewis, IES Policy Lead (joseph@the-ies.org).

Image credit: © Andy via AdobeStock