---
title: "L MASON HSE SERVICES LTD — Ownership Dossier"
canonical: https://whiteintel.dev/entity/2b2be6ae-a01c-586a-a47d-e5740f42e2e6
json: https://whiteintel.dev/api/public/dossier/2b2be6ae-a01c-586a-a47d-e5740f42e2e6
identifier: oo:GB-COH-11808871
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# L MASON HSE SERVICES LTD

**Type:** Company  
**Jurisdiction:** GB  
**Identifier:** `oo:GB-COH-11808871`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/2b2be6ae-a01c-586a-a47d-e5740f42e2e6  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/2b2be6ae-a01c-586a-a47d-e5740f42e2e6  

## Ownership & control

### Owners / controllers

- **Mr Leslie George Mason** (beneficial owner) — 100% — https://whiteintel.dev/entity/b0288076-fb3f-5924-84e1-154b9b0f7272
- **Mr Leslie George Mason** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/3f4b5e3f-0dbc-48de-bc19-f86ccbb41cf3

### UBO chain (walk to the ultimate owner)

A **2-step** ownership/control chain to the ultimate beneficial owner is resolved for this entity. The full cited chain unlocks with a paid API key or a one-off dossier — https://whiteintel.dev/pricing.

## Company profile (live · UK Companies House)

- **Company number:** `11808871`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2019-02-06
- **Registered office:** 23 Cowell Grove Highfield, Rowlands Gill, NE39 2JQ, United Kingdom
- **SIC:** 71129

## Financials (Companies House accounts)

| Figure | 2026-02-28 |
|---|---:|
| Net assets | £61,123 |
| Cash | £56,887 |
| Current assets | £69,952 |
| Employees | 2 |

_Latest filed period. Full 2-year history unlocks with a paid dossier — https://whiteintel.dev/pricing. As filed at Companies House._

### Officers

- MASON, Leslie George — director · British · appointed 2019-02-06

### Beneficial owners (Persons with Significant Control)

- Mr Leslie George Mason — 75–100% shares · individual PSC · United Kingdom — since 2019-02-06

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/11808871
- companies_house_accounts — https://find-and-update.company-information.service.gov.uk/company/11808871/filing-history
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/11808871

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **L MASON HSE SERVICES LTD**. Human view: https://whiteintel.dev/entity/2b2be6ae-a01c-586a-a47d-e5740f42e2e6 · Structured JSON: https://whiteintel.dev/api/public/dossier/2b2be6ae-a01c-586a-a47d-e5740f42e2e6._

_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"._