---
title: "Mrs Diane Margaret Costello — Ownership Dossier"
canonical: https://whiteintel.dev/entity/fbccabae-ee80-4ebd-935f-b2a1480cc7f0
json: https://whiteintel.dev/api/public/dossier/fbccabae-ee80-4ebd-935f-b2a1480cc7f0
identifier: psc:ejFYyNOD8rLPqSRUL7UQMG-l2h4
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mrs Diane Margaret Costello

**Type:** Person  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `psc:ejFYyNOD8rLPqSRUL7UQMG-l2h4`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/fbccabae-ee80-4ebd-935f-b2a1480cc7f0  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/fbccabae-ee80-4ebd-935f-b2a1480cc7f0  

## Ownership & control

### Holdings / subsidiaries

- **TOLWORTH FENCING SUPPLIES LTD** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/77ef07e2-ed44-51d5-b294-979c6ea72a61

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mrs Diane Margaret Costello**. Human view: https://whiteintel.dev/entity/fbccabae-ee80-4ebd-935f-b2a1480cc7f0 · Structured JSON: https://whiteintel.dev/api/public/dossier/fbccabae-ee80-4ebd-935f-b2a1480cc7f0._

_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"._