---
title: "Mr John Mark Griffiths — Ownership Dossier"
canonical: https://whiteintel.dev/entity/5521936c-96eb-4860-89ef-61d074ebe4fa
json: https://whiteintel.dev/api/public/dossier/5521936c-96eb-4860-89ef-61d074ebe4fa
identifier: psc:1dqU8uYas8ar0xfh4CPlBdlej50
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mr John Mark Griffiths

**Type:** Person  
**Jurisdiction:** GB  
**Identifier:** `psc:1dqU8uYas8ar0xfh4CPlBdlej50`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/5521936c-96eb-4860-89ef-61d074ebe4fa  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/5521936c-96eb-4860-89ef-61d074ebe4fa  

## Ownership & control

### Holdings / subsidiaries

- **JMG PLUMBING & HEATING LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/56f59df0-6a6a-5833-a05e-3cec8b39003e

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mr John Mark Griffiths**. Human view: https://whiteintel.dev/entity/5521936c-96eb-4860-89ef-61d074ebe4fa · Structured JSON: https://whiteintel.dev/api/public/dossier/5521936c-96eb-4860-89ef-61d074ebe4fa._

_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"._