Full Breakdown
Basildon Hospital Maternity Staff Sue Over Hazardous Nitrous Oxide Exposure
5/18/2026, 10:37:03 PM
Core Event (Legal Action)
More than 100 maternity staff—including midwives and healthcare assistants—who worked at Basildon Hospital (Mid and South Essex NHS Foundation Trust) from 2018-2023 have filed legal claims alleging exposure to nitrous oxide (Entonox) at concentrations up to 30 times the legal workplace limit. The claimants seek personal-injury damages exceeding £1,500 each, and the High Court will hear the consolidated case in July. The trust has already paid £89,000 in settlements.
Background & Context
An independent Good Governance Institute review, prompted by staff concerns in July 2021, found the trust “failed to act with candour” and delayed mitigation until October 2022. The review labelled the exposure a “significant risk to health.” The trust now uses scavenger equipment to remove nitrous oxide from the air.
Data & Statistics
NHS Resolution recorded 141 claims, with over 100 staff seeking >£1,500 each. Settlements total £89,000. Tests showed nitrous-oxide up to 30 times the legal limit, a level linked to neurological harm by the Health and Safety Executive.
Official Statements & Responses
Denise Townsend, acting chief nursing officer, said the trust apologised and recognised it should have acted faster, adding that lessons have been learned and oversight of gas monitoring has been improved. Chief executive Matthew Hopkins described the delay as simply unacceptable and said new systems keep nitrous-oxide within safe limits. The trust confirms scavenger equipment is operational.
Criticism & Opposition
An unnamed staff member told the BBC the team had been exposed to a toxic environment and called the trust’s response a severe breach of trust. She reported chronic fatigue, persistent headaches, low vitamin B12, heart palpitations and foggy thinking. Another midwife said she collapsed at work because of the symptoms.
Conflicting Reports & Gaps
The trust says current levels are safe, but claimants still report symptoms. No independent post-mitigation testing has been published, and the proportion of maternity staff affected is not known.
Verbatim Quotes
- “poisoned” — Unnamed female staff member, maternity staff
- “The way they were treated was a "massive kick in the teeth" and it had caused widespread anger, she said.” — Unnamed female staff member
- “Mid and South Essex NHS Foundation Trust chief executive Matthew Hopkins previously said in 2024: “While we now have robust systems in place and are confident that nitrous oxide levels are well within the safe limits, it is simply not acceptable that we took so long to act.” — Matthew Hopkins, Chief Executive, Mid and South Essex NHS Foundation Trust
- “We are sorry and acknowledge that we should have acted faster to address the issues.” — Denise Townsend, Acting Chief Nursing Officer, Mid and South Essex NHS Foundation Trust
- “We have supported our members, both individually and collectively, where we believe employers have failed in their duty to provide a healthy and safe working environment.” — Lynn Collins, Director for Representation and Organising, Royal College of Midwives
What’s Next
The High Court hearing in July could set a precedent for NHS maternity safety. The trust will keep monitoring with the scavenger system, though independent testing may still be needed. The outcome may shape future medical-gas policies and trigger wider audits.
