---
title: "QUADRO HARSTON LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/2c962e01-c282-5cbd-a32a-2c52a539b2bc
json: https://whiteintel.dev/api/public/dossier/2c962e01-c282-5cbd-a32a-2c52a539b2bc
identifier: oo:GB-COH-02015785
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# QUADRO HARSTON LIMITED

**Type:** Company  
**Jurisdiction:** GB  
**Identifier:** `oo:GB-COH-02015785`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/2c962e01-c282-5cbd-a32a-2c52a539b2bc  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/2c962e01-c282-5cbd-a32a-2c52a539b2bc  

## Cross-source identity

The same real-world entity, resolved across sources:

- **QUADRO HARSTON LIMITED** — GLEIF · `lei:213800NJBH1SC4JK7233` — https://whiteintel.dev/entity/f9b95bd7-5a9f-54a3-8d16-591bd0761dc3

## Ownership & control

### Owners / controllers

- **SCIENCE GROUP PLC** (beneficial owner) — 100% — https://whiteintel.dev/entity/30ea5b9d-1a9d-523b-9f24-28454ff9ee4a
- **SCIENCE GROUP PLC** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/30ea5b9d-1a9d-523b-9f24-28454ff9ee4a

### UBO chain (walk to the ultimate owner)

1. **SCIENCE GROUP PLC** — beneficial owner 100% → *QUADRO HARSTON LIMITED*
1. **SCIENCE GROUP PLC** — beneficial owner 87.5% → *QUADRO HARSTON LIMITED*
1. **SCIENCE GROUP PLC** — ultimate parent → *QUADRO HARSTON LIMITED*
1. **SCIENCE GROUP PLC** — parent → *QUADRO HARSTON LIMITED*
2. **Mr Martyn Roy Ratcliffe** — beneficial owner 50% → *SCIENCE GROUP PLC*
2. **Mr Martyn Roy Ratcliffe** — beneficial owner 37.5% → *SCIENCE GROUP PLC*

## Company profile (live · UK Companies House)

- **Company number:** `02015785`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 1986-04-30
- **Registered office:** Harston Mill, Harston, Cambridge, Cambridgeshire, CB22 7GG
- **SIC:** 64209, 74909

### Officers

- COLE, Sarah Elizabeth — secretary · appointed 2014-01-27
- BRETT, Jonathan — director · British · appointed 2021-07-23
- COLE, Sarah Elizabeth — director · British · appointed 2011-03-02
- EDWARDS, Daniel Robert Morgan — director · British · appointed 2014-06-03
- BARRETT HAGUE, Helen Patricia — secretary · British · appointed 2001-09-25 · resigned 2008-04-23
- ELTON, Neil — secretary · appointed 2010-08-02 · resigned 2014-01-27
- FARMER, David — secretary · British · appointed 1993-03-18 · resigned 1997-09-03
- FROST, Martin John — secretary · British · appointed 1997-09-03 · resigned 2001-09-25
- MARAN, Roger — secretary · British · resigned 1993-03-18
- MCCARTHY, Guy Jonathan — secretary · British · appointed 2008-04-23 · resigned 2010-08-02
- ARCHER, Rebecca Anne — director · British · appointed 2014-01-27 · resigned 2021-04-09
- BROWN, Alistair John Cameron, Dr — director · British · appointed 2007-05-23 · resigned 2009-04-10
- CLARK, Mark Thomas — director · British · appointed 2003-03-14 · resigned 2003-09-18
- COGGILL, Christopher John — director · British · resigned 2005-04-15
- COLLINS, Ian Peter — director · British · appointed 2001-12-01 · resigned 2003-10-31
- CROSSFIELD, Michael, Dr — director · British · appointed 2002-04-12 · resigned 2003-07-31
- DANNATT, Margaret Anne, Dr — director · British · appointed 2002-08-19 · resigned 2003-07-31
- DAVEY, Simon — director · British · appointed 2001-10-23 · resigned 2006-11-02
- EDGE, Gordon Malcolm — director · British · resigned 2002-04-12
- ELTON, Neil Anthony — director · British · appointed 2010-08-02 · resigned 2014-02-14

### Beneficial owners (Persons with Significant Control)

- [Science Group Plc](https://whiteintel.dev/entity/30ea5b9d-1a9d-523b-9f24-28454ff9ee4a) — 75–100% shares · corporate PSC · England — since 2016-04-06

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/02015785
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/02015785

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **QUADRO HARSTON LIMITED**. Human view: https://whiteintel.dev/entity/2c962e01-c282-5cbd-a32a-2c52a539b2bc · Structured JSON: https://whiteintel.dev/api/public/dossier/2c962e01-c282-5cbd-a32a-2c52a539b2bc._

_Risk levels are heuristic investigative leads, not legal determinations of beneficial ownership. Every claim carries a source; an absent edge means "not yet observed in current sources", not "does not exist"._