Cavendish: Who's Who Insight Report
Date published:
October 28, 2025

As the Government transitions from foundations to delivery, understanding the evolving architecture behind the scenes is essential.Cavendish’s 2025 “Who’s Who” report provides a definitive, meticulously researched guide to the advisers and teams shaping policy and influence at the heart of Whitehall. With a huge reshuffle, lots of the faces in Westminster have changed or moved.This brand-new edition for 2025 offers:
- A comprehensive overview of the Prime Minister’s senior team and the advisers driving the government’s agenda inside No.10, the Treasury and all other key government departments.
- Insight into the reorganisation of key personnel and the emergence of new power centres.
- Analysis of the relationships and roles that underpin influence across government.
For organisations seeking to engage effectively with government, this report is essential reading.Download the full report to inform your strategy and engagement.
More from the water sector
Find out how the UK water sector is informing, innovating, and influencing change
Future Water Awards 2026 – Nominations now open
Celebrate excellence in the UK water sector by nominating outstanding individuals and organisations for the 2026 Future Water Awards, recognising emerging talent, people, and above-and-beyond contributions.
Drive to tackle I&I with “high fidelity” data
New Environment Agency requirements on sewer overflow reporting are placing urgent pressure on water companies to better quantify and reduce groundwater infiltration in wastewater networks. In this article, Ryan Pearson, Head of Strategy at Metasphere (a Grundfos company), explains how high-quality data and advanced monitoring can help utilities meet new compliance requirements, reduce pollution events, and support lower-carbon, nature-based infrastructure solutions.
New Environment Agency guidance on sewer overflow reporting is pushing water companies to better quantify groundwater infiltration and reduce wastewater network overflows.
Reg 4 and Reg 31 — More Than Just Specification Language
Regulation 4 and Regulation 31 are often referenced in UK water industry specifications, but their impact on manufacturers and the supply chain is far-reaching. In this article, Groundbreaker Systems explores how approvals such as WRAS, KIWA and NSF shape product design, testing and compliance. While rigorous and costly to achieve, these approvals provide vital assurance that materials and products used in water networks will protect drinking water quality and perform reliably for decades. Ultimately, compliance is not just about certification, it is about safeguarding the safety and resilience of the UK’s water infrastructure.
How Regulation 4 and Regulation 31 approvals shape product testing, compliance and trust across the UK water supply chain.
