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United Kingdom National Nuclear Laboratory Limited

03857752

active
ltd
england wales
Companies House
Health Score
65 / 100

Some Concerns

25/30
Filing
0/30
Financial
40/40
Risk

No risk factors detected.

Details

Chadwick House Warrington Road, Birchwood Park, Warrington, WA3 6AE
Incorporated 07/10/1999

Previously known as

National Nuclear Laboratory Limited · until 17/12/2024
Nexia Solutions Limited · until 10/11/2008
United Nuclear Technologies Limited · until 08/11/2004

Compliance

Last accounts

30/09/2025

full

Next accounts due

30/06/2027

On track

Confirmation statement

Last: 07/10/2025

Due 21/10/2026

On track

Industry

71122
Engineering related scientific and technical consulting activities
71200
Technical testing and analysis

Officers

Mr Iain Geoffrey Clarkson

director · Since 01/10/2019

CHARTERED ACCOUNTANT

BRITISH · ENGLAND · Age 59

Mrs Samantha Wheeler

secretary · Since 18/09/2023

Professor Neil Graham Smart

director · Since 01/04/2025

COMPANY DIRECTOR

BRITISH · UNITED KINGDOM · Age 62

Also on 1 other board

Mrs Julianne Antrobus

director · Since 01/04/2025

CHIEF EXECUTIVE OFFICER

BRITISH · ENGLAND · Age 52

Also on 1 other board

Mrs Hannah Brewer Gray

director · Since 21/10/2025

CIVIL SERVANT

BRITISH · UNITED KINGDOM · Age 50

Mr David Douglas Scott

director · Since 23/01/2026

BRITISH · ENGLAND · Age 59

Also on 1 other board

Mr Brian Thomas Tenner

director · Since 29/04/2026

BRITISH,IRISH · ENGLAND · Age 58

Also on 11 other boards

Mrs Mandy Dawn Clarke

director · Since 29/04/2026

BRITISH · ENGLAND · Age 61

Also on 5 other boards

Iain Geoffrey Clarkson

director · Since 01/10/2019

British · England · Age 59

Samantha Wheeler

secretary · Since 18/09/2023

Neil Graham Smart

director · Since 01/04/2025

British · United Kingdom · Age 62

Julianne Antrobus

director · Since 01/04/2025

British · England · Age 52

Hannah Brewer Gray

director · Since 21/10/2025

British · United Kingdom · Age 50

David Douglas Scott

director · Since 23/01/2026

British · England · Age 59

Mandy Dawn Clarke

director · Since 29/04/2026

British · England · Age 61

Brian Thomas Tenner

director · Since 29/04/2026

British,Irish · England · Age 58

Former

Colin Stuart Reid

secretary · Resigned 14/03/2005

John Frederick Edwards

secretary · Resigned 24/03/2005

Alvin Joseph Shuttleworth

director · Resigned 01/11/2007

Alvin Joseph Shuttleworth

secretary · Resigned 01/11/2007

John Frederick Edwards

director · Resigned 30/06/2008

Colin Stuart Reid

secretary · Resigned 01/02/2009

Amanda Jean Mayor

director · Resigned 03/04/2009

Jason Sharp

director · Resigned 03/04/2009

Andrew David Elsden

director · Resigned 03/04/2009

Peter Anthony Bleasdale

director · Resigned 03/04/2009

Michael David Parker

director · Resigned 03/04/2009

Richard Alexander Mcgregor Ramsay

director · Resigned 30/06/2009

Susan Quint

director · Resigned 07/09/2009

Susan Jee

director · Resigned 07/09/2009

Susan Quint

secretary · Resigned 07/09/2009

Michael Lawrence

director · Resigned 01/01/2011

Andrew David Elsden

secretary · Resigned 25/03/2013

Ian Michael Smale

director · Resigned 31/12/2013

Peter Nicholas Jones

director · Resigned 31/07/2014

David Charles Healey

director · Resigned 07/07/2015

Richard Henry Maudslay

director · Resigned 17/12/2015

Craig Douglas Lester

director · Resigned 28/01/2016

Jilly-Ann Atherton

director · Resigned 16/08/2017

Jonathan Peter Walker

director · Resigned 20/04/2018

Ruth Marie Dunphy

director · Resigned 19/03/2019

John Malcolm Lanaghan

director · Resigned 30/09/2019

Michael William Weightman

director · Resigned 31/05/2020

Andrew Hamilton Sherry

director · Resigned 30/06/2020

Anna Charlotte Payton

director · Resigned 19/10/2021

Andrew David Hugh Mathews

director · Resigned 25/01/2022

Claire Louise Flint

director · Resigned 21/04/2023

David John Beacham

director · Resigned 03/05/2023

David Barry Dukes

secretary · Resigned 18/09/2023

Fiona Elizabeth Rayment

director · Resigned 31/10/2023

Paul John Arton Howarth

director · Resigned 31/03/2025

Clare Marie Barlow

director · Resigned 31/03/2025

Stephen John Garwood

director · Resigned 31/03/2025

Matthew Stephen Miller

director · Resigned 30/07/2025

Edward Horatio Emerson

director · Resigned 17/10/2025

Ian Grant Funnell

director · Resigned 31/12/2025

Ann Catherine Cormack

director · Resigned 20/04/2026

Persons with Significant Control

Nnl Holdings Limited

75–100% shares
75–100% votes
Appoint directors

Chadwick House, Warrington Road, Warrington, WA3 6AE

Reg: 06859180 · Companies House · Private Company Limited By Shares

Notified 06/04/2016

Change History

statusactive
2026-08-17

Active

typeltd
2026-08-17

Private Limited Company

address line1Chadwick House Warrington Road
2026-08-17

CHADWICK HOUSE WARRINGTON ROAD

post townWarrington
2026-08-17

WARRINGTON

officer appointedWHEELER, Samantha
2026-08-17
officer appointedANTROBUS, Julianne
2026-08-17
officer appointedCLARKE, Mandy Dawn
2026-08-17
officer appointedCLARKSON, Iain Geoffrey
2026-08-17
officer appointedGRAY, Hannah Brewer
2026-08-17
officer appointedSCOTT, David Douglas
2026-08-17
officer appointedSMART, Neil Graham, Professor
2026-08-17
officer appointedTENNER, Brian Thomas
2026-08-17