---
title: "Mr Harry Denis Mackness — Ownership Dossier"
canonical: https://whiteintel.dev/entity/0ca2fa1a-a4bd-491d-acc2-2316f962ca7e
json: https://whiteintel.dev/api/public/dossier/0ca2fa1a-a4bd-491d-acc2-2316f962ca7e
identifier: psc:9UOfBNQtAxfOI9jJRD8nDyelz84
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Mr Harry Denis Mackness

**Type:** Person  
**Jurisdiction:** GB  
**Identifier:** `psc:9UOfBNQtAxfOI9jJRD8nDyelz84`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/0ca2fa1a-a4bd-491d-acc2-2316f962ca7e  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/0ca2fa1a-a4bd-491d-acc2-2316f962ca7e  

## Ownership & control

### Holdings / subsidiaries

- **HDM ELECTRICAL SERVICES LTD** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/079f55da-2dfc-53a2-ade2-979431fec7f4

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Mr Harry Denis Mackness**. Human view: https://whiteintel.dev/entity/0ca2fa1a-a4bd-491d-acc2-2316f962ca7e · Structured JSON: https://whiteintel.dev/api/public/dossier/0ca2fa1a-a4bd-491d-acc2-2316f962ca7e._

_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"._