---
title: "HEART AND RHYTHM DIAGNOSTICS LTD — Ownership Dossier"
canonical: https://whiteintel.dev/entity/9947afb1-18c8-579e-8ef4-7a67addc7632
json: https://whiteintel.dev/api/public/dossier/9947afb1-18c8-579e-8ef4-7a67addc7632
identifier: oo:GB-COH-13622631
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# HEART AND RHYTHM DIAGNOSTICS LTD

**Type:** Company  
**Jurisdiction:** GB  
**Identifier:** `oo:GB-COH-13622631`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/9947afb1-18c8-579e-8ef4-7a67addc7632  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/9947afb1-18c8-579e-8ef4-7a67addc7632  

## Ownership & control

### Owners / controllers

- **Mr Jonathan Griffiths** (beneficial owner) — 50% — https://whiteintel.dev/entity/08fd7903-e404-5012-94c2-fd099b52bc87
- **Rebecca Griffiths** (beneficial owner) — 50% — https://whiteintel.dev/entity/3a488df4-6458-528d-8c83-20f78e90da0f
- **Mr Jonathan Griffiths** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/88f579b5-dbc7-4cdb-ac1c-ed74448e681f
- **Rebecca Griffiths** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/2a6d8cdc-d97d-417c-8834-60a8a9a9d51c
- **Mrs Rebecca Griffiths** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/9dc066bf-9c09-4e58-a4e7-bb76aa4ce579

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

A **5-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:** `13622631`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2021-09-15
- **Registered office:** 71-75 Shelton Street, Covent Garden, London, WC2H 9JQ, United Kingdom
- **SIC:** 86220

### Officers

- GRIFFITHS, Rebecca — secretary · appointed 2026-05-17
- GRIFFITHS, Jonathan — director · British · appointed 2021-09-15
- GRIFFITHS, Rebecca — secretary · appointed 2021-09-15 · resigned 2025-03-31
- GRIFFITHS, Rebecca — director · British · appointed 2025-04-01 · resigned 2026-05-17

### Beneficial owners (Persons with Significant Control)

- Mr Jonathan Griffiths — 25–50% shares · individual PSC · United Kingdom — since 2021-09-15
- Mrs Rebecca Griffiths — 25–50% shares · individual PSC · United Kingdom — since 2021-09-15
- Rebecca Griffiths — 25–50% shares · individual PSC · United Kingdom — ceased 2025-04-05

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/13622631
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/13622631

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **HEART AND RHYTHM DIAGNOSTICS LTD**. Human view: https://whiteintel.dev/entity/9947afb1-18c8-579e-8ef4-7a67addc7632 · Structured JSON: https://whiteintel.dev/api/public/dossier/9947afb1-18c8-579e-8ef4-7a67addc7632._

_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"._