---
title: "SENTRY ALERT SYSTEMS LTD — Ownership Dossier"
canonical: https://whiteintel.dev/entity/8d60e594-3cf2-5271-ad0d-36f4eac09009
json: https://whiteintel.dev/api/public/dossier/8d60e594-3cf2-5271-ad0d-36f4eac09009
identifier: oo:GB-COH-12054795
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# SENTRY ALERT SYSTEMS LTD

**Type:** Company  
**Jurisdiction:** GB  
**Identifier:** `oo:GB-COH-12054795`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/8d60e594-3cf2-5271-ad0d-36f4eac09009  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/8d60e594-3cf2-5271-ad0d-36f4eac09009  

## Ownership & control

### Owners / controllers

- **Mr Mark Charles Crook** (beneficial owner) — 100% — https://whiteintel.dev/entity/49c0c36c-d9bc-5313-8337-e61b3b2cf93c
- **Mr Mark Charles Crook** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/f00f8dbd-ac72-4f31-81ed-83dfc95a11d1

### 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:** `12054795`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2019-06-17
- **Registered office:** 7 Kingsway Court, Chandler's Ford, Eastleigh, SO53 1FG, United Kingdom
- **SIC:** 80200

### Officers

- CROOK, Mark Charles — director · British · appointed 2019-06-17

### Beneficial owners (Persons with Significant Control)

- Mr Mark Charles Crook — 75–100% shares · individual PSC · United Kingdom — since 2019-06-17

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/12054795
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/12054795

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **SENTRY ALERT SYSTEMS LTD**. Human view: https://whiteintel.dev/entity/8d60e594-3cf2-5271-ad0d-36f4eac09009 · Structured JSON: https://whiteintel.dev/api/public/dossier/8d60e594-3cf2-5271-ad0d-36f4eac09009._

_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"._