---
title: "Mr William Godfrey Leyborne Echlin — Ownership Dossier"
canonical: https://whiteintel.dev/entity/d87493bc-e577-54b6-973b-bf3072a2a04a
json: https://whiteintel.dev/api/public/dossier/d87493bc-e577-54b6-973b-bf3072a2a04a
identifier: oo-person:GB-COH-PER-10404556-PjERjQR_j41RGfHXXoiQJiCoJaU
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mr William Godfrey Leyborne Echlin

**Type:** Person  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo-person:GB-COH-PER-10404556-PjERjQR_j41RGfHXXoiQJiCoJaU`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/d87493bc-e577-54b6-973b-bf3072a2a04a  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/d87493bc-e577-54b6-973b-bf3072a2a04a  

## Ownership & control

### Holdings / subsidiaries

- **TEST MANAGEMENT SYSTEMS LTD** (beneficial owner) — 75% — https://whiteintel.dev/entity/72cbc3c5-ff7d-577c-ab74-da86ba35b43b

## Provenance

- OpenOwnership — https://www.openownership.org

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mr William Godfrey Leyborne Echlin**. Human view: https://whiteintel.dev/entity/d87493bc-e577-54b6-973b-bf3072a2a04a · Structured JSON: https://whiteintel.dev/api/public/dossier/d87493bc-e577-54b6-973b-bf3072a2a04a._

_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"._