---
title: "SONAR RESEARCH & DEVELOPMENT LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/edd6df91-622b-5ec9-b2f5-5dbd800cd4b7
json: https://whiteintel.dev/api/public/dossier/edd6df91-622b-5ec9-b2f5-5dbd800cd4b7
identifier: oo:GB-COH-01557176
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# SONAR RESEARCH & DEVELOPMENT LIMITED

**Type:** Company  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo:GB-COH-01557176`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/edd6df91-622b-5ec9-b2f5-5dbd800cd4b7  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/edd6df91-622b-5ec9-b2f5-5dbd800cd4b7  

## Ownership & control

### Owners / controllers

- **HALMA PUBLIC LIMITED COMPANY** (beneficial owner) — 100% — https://whiteintel.dev/entity/6f19f458-8147-5575-8aac-bb326e120e09
- **HALMA PUBLIC LIMITED COMPANY** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/6f19f458-8147-5575-8aac-bb326e120e09

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

A **2-step** ownership/control chain to the ultimate beneficial owner is resolved for this entity. The full cited chain unlocks with a paid API key or a one-off dossier — https://whiteintel.dev/pricing.

## Company profile (live · UK Companies House)

- **Company number:** `01557176`
- **Status:** dissolved
- **Type:** ltd
- **Incorporated:** 1981-04-22
- **Registered office:** Misbourne Court, Rectory Way, Amersham, Buckinghamshire, HP7 0DE
- **SIC:** 74990

### Officers

- JENKINS, Mark Alun — secretary · appointed 2018-10-01
- GUNNING, Stephen William Lawrence — director · British · appointed 2023-01-16
- JENKINS, Mark Alun — director · British · appointed 2018-10-01
- BESWICK, Simon — secretary · British · appointed 2007-10-01 · resigned 2011-10-14
- CHESNEY, Carol Tredway — secretary · appointed 2012-07-27 · resigned 2018-09-30
- HEATON, Timothy John Barclay — secretary · British · appointed 2003-08-20 · resigned 2007-10-01
- HILL, Simon John — secretary · British · appointed 2003-02-27 · resigned 2003-05-09
- MCCLOY, Jacqueline — secretary · appointed 2011-10-14 · resigned 2012-07-27
- STEVENS, Rachel Barbara — secretary · British · resigned 2003-02-27
- BESWICK, Simon — director · British · appointed 2007-10-01 · resigned 2012-07-27
- BULLOCK, Brian Standidge — director · British · appointed 2002-12-01 · resigned 2010-01-29
- CHESNEY, Carol Tredway — director · American · appointed 2012-07-27 · resigned 2018-09-30
- HEATON, Timothy John Barclay — director · British · appointed 1996-12-18 · resigned 2007-10-01
- LAVELLE, Mark Stephen — director · British · appointed 2012-07-27 · resigned 2017-02-16
- MARSH, Richard John — director · British · appointed 2007-10-01 · resigned 2009-02-19
- MCCLOY, Jacqueline — director · British · appointed 2010-08-02 · resigned 2012-07-27
- RONCHETTI, Marc Arthur — director · British · appointed 2019-12-04 · resigned 2023-01-16
- STEVENS, Peter John, Dr — director · British · resigned 2007-10-01

### Beneficial owners (Persons with Significant Control)

- [Halma Plc](https://whiteintel.dev/entity/6f19f458-8147-5575-8aac-bb326e120e09) — 75–100% shares · corporate PSC · England — since 2016-04-06

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/01557176

## Get the full, resolved dossier (agent-callable)

The above is the free teaser. The resolved **multi-hop UBO chain**, ownership **%**, full **financial history**, itemised **assets** and the hop-by-hop **exposure path** are the paid depth — callable as tools from your agent:

```bash
npx -y @whiteintel/mcp-server   # then: get_dossier · trace_ownership_path · check_offshore_exposure
```

Or unlock a one-off cited dossier for **SONAR RESEARCH & DEVELOPMENT LIMITED** — https://whiteintel.dev/entity/edd6df91-622b-5ec9-b2f5-5dbd800cd4b7 · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **SONAR RESEARCH & DEVELOPMENT LIMITED**. Human view: https://whiteintel.dev/entity/edd6df91-622b-5ec9-b2f5-5dbd800cd4b7 · Structured JSON: https://whiteintel.dev/api/public/dossier/edd6df91-622b-5ec9-b2f5-5dbd800cd4b7._

_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"._