We’re a small team with big ideas and a passion for doing things right.
We combine decades of experience, a deep understanding of industry processes, and a shared passion for fairness.
Our mission is to deliver accurate billing, meaningful savings and complete peace of mind for every organisation we work with.
Our Durham based team are highly skilled and experienced independent water specialists providing expertise, analysis and market intelligence in the water sector.
Meet the Team
Sarah Gilley
Operations Director
Originally from Blackburn, now Durham based, Sarah is a specialist in resolving complex billing issues and identifying significant incorrect charges that lead directly to recovery opportunities for customers.
With extensive experience across both Wholesale and Retail organisations, she has been a trusted lead contact for high‑level complaints, dispute management, and regulatory escalations, including cases taken through ADR and legal resolution.
In her most recent role, Sarah worked as a Key Revenue Assurance Analyst within a Retailer, focusing on incorrect cost recovery, billing accuracy, and revenue protection.
Sarah’s meticulous approach and deep understanding of industry processes enable her to uncover issues that are often overlooked.
Sarah is excited to bring her expertise to WTR Utilities, where her determination, insight, and customer‑first mindset will help businesses secure the refunds and clarity they deserve.
David Oliver-Sheppard
Managing Director/CEO
Having lived in the North East all his life, David brings extensive expertise from both the Wholesale and Retail sides of the water industry, with a proven track record of improving financial accuracy, operational performance, and customer outcomes.
As a Settlement Manager, David applied advanced analytical skills, market intelligence, and process optimisation to strengthen settlement accuracy for a major Wholesaler.
As Head of Revenue Assurance for a Retailer, he enhanced financial credibility, reduced risk, and ensured robust revenue protection across the business.
Throughout his career, David has remained firmly focused on the customer. His decision to establish WTR Utilities was driven by a desire to deliver a truly customer‑led consultancy, free from the constraints of traditional commercial models.
His mission is simple: to ensure every organisation receives fair, accurate, and transparent water charging.