---
title: "Mr Martyn John Grenfell — Ownership Dossier"
canonical: https://whiteintel.dev/entity/ba466941-e0fc-4040-95ec-56ba5b3b1cd0
json: https://whiteintel.dev/api/public/dossier/ba466941-e0fc-4040-95ec-56ba5b3b1cd0
identifier: psc:YrG1T_ZZzLIwuL1OrsDbADjdg6Q
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mr Martyn John Grenfell

**Type:** Person  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `psc:YrG1T_ZZzLIwuL1OrsDbADjdg6Q`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/ba466941-e0fc-4040-95ec-56ba5b3b1cd0  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/ba466941-e0fc-4040-95ec-56ba5b3b1cd0  

## Ownership & control

### Holdings / subsidiaries

- **ASHDOWN RADIO LIMITED** (beneficial owner) — https://whiteintel.dev/entity/0c35c0a2-a137-5e66-b42e-56bcf005e459

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mr Martyn John Grenfell**. Human view: https://whiteintel.dev/entity/ba466941-e0fc-4040-95ec-56ba5b3b1cd0 · Structured JSON: https://whiteintel.dev/api/public/dossier/ba466941-e0fc-4040-95ec-56ba5b3b1cd0._

_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"._