---
title: "Mr John Buckmaster — Ownership Dossier"
canonical: https://whiteintel.dev/entity/42db17bf-eb02-4c6c-b8a3-d081741cbaa5
json: https://whiteintel.dev/api/public/dossier/42db17bf-eb02-4c6c-b8a3-d081741cbaa5
identifier: psc:ubJN3lNHk-lhobo7_P8iW7udNKo
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mr John Buckmaster

**Type:** Person  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `psc:ubJN3lNHk-lhobo7_P8iW7udNKo`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/42db17bf-eb02-4c6c-b8a3-d081741cbaa5  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/42db17bf-eb02-4c6c-b8a3-d081741cbaa5  

## Ownership & control

### Holdings / subsidiaries

- **THE RAILWAY JIGSAW COMPANY LIMITED** (beneficial owner) — https://whiteintel.dev/entity/85f418c7-00a7-5e88-ac2c-b88b7aab3520

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mr John Buckmaster**. Human view: https://whiteintel.dev/entity/42db17bf-eb02-4c6c-b8a3-d081741cbaa5 · Structured JSON: https://whiteintel.dev/api/public/dossier/42db17bf-eb02-4c6c-b8a3-d081741cbaa5._

_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"._