---
title: "1ST STORAGE UK LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/c8a6ef13-9cfe-5108-9cb7-a55879cea5bc
json: https://whiteintel.dev/api/public/dossier/c8a6ef13-9cfe-5108-9cb7-a55879cea5bc
identifier: oo:GB-COH-04001862
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# 1ST STORAGE UK LIMITED

**Type:** Company  
**Jurisdiction:** GB  
**Identifier:** `oo:GB-COH-04001862`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/c8a6ef13-9cfe-5108-9cb7-a55879cea5bc  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/c8a6ef13-9cfe-5108-9cb7-a55879cea5bc  

## Ownership & control

### Owners / controllers

- **Mrs Helen Christine Mason** (beneficial owner) — 50% — https://whiteintel.dev/entity/cb810d41-49c5-5ab8-ac59-7c724594e2fa
- **Mr Stuart Mason** (beneficial owner) — 100% — https://whiteintel.dev/entity/521f5519-54c6-5121-bb8c-2c1ffd67fab3
- **Mr Anthony Martin Joyce** (beneficial owner) — 100% — https://whiteintel.dev/entity/260ce4ad-b1aa-5b8b-836e-a8dbdba6fdb3
- **Mrs Helen Christine Mason** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/e7c872ad-fe53-4c32-a4b4-5c067f7fcaa1
- **Mr Anthony Martin Joyce** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/7e0058f6-26ed-4f30-9daf-7c6560452bbc
- **Mr Stuart Mason** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/7cab095c-4686-47ca-a546-d15cf00f6c95

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

1. **Mrs Helen Christine Mason** — beneficial owner 50% → *1ST STORAGE UK LIMITED*
1. **Mr Stuart Mason** — beneficial owner 100% → *1ST STORAGE UK LIMITED*
1. **Mr Anthony Martin Joyce** — beneficial owner 100% → *1ST STORAGE UK LIMITED*
1. **Mrs Helen Christine Mason** — beneficial owner 37.5% → *1ST STORAGE UK LIMITED*
1. **Mr Anthony Martin Joyce** — beneficial owner 87.5% → *1ST STORAGE UK LIMITED*
1. **Mr Stuart Mason** — beneficial owner 87.5% → *1ST STORAGE UK LIMITED*

## Company profile (live · UK Companies House)

- **Company number:** `04001862`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2000-05-25
- **Registered office:** Unit 1 Holmecroft, York Road, Leeds, West Yorkshire, LS15 4NF
- **SIC:** 43290, 96090

## Financials (Companies House accounts)

| Figure | 2025-08-31 | 2024-08-31 |
|---|---:|---:|
| Net assets | £45,443 | £27,201 |
| Shareholder funds | £45,443 | £27,201 |
| Fixed assets | £38,754 | £0 |
| Current assets | £48,769 | £29,861 |
| Employees | 0 | 0 |

_As filed at Companies House. Micro-entities file no profit-and-loss account._

### Officers

- JOYCE, Anthony Martin — director · British · appointed 2024-06-25
- MASON, Helen — secretary · British · appointed 2005-08-23 · resigned 2025-04-17
- WILSON, Marvin Lee — secretary · British · appointed 2000-05-25 · resigned 2005-08-23
- YORK PLACE COMPANY SECRETARIES LIMITED — corporate nominee secretary · appointed 2000-05-25 · resigned 2000-05-25
- MASON, Helen Christine — director · British · appointed 2021-02-01 · resigned 2025-04-17
- MASON, Stuart — director · British · appointed 2000-05-25 · resigned 2021-04-06
- STEEL, Michael — director · British · appointed 2011-07-01 · resigned 2012-05-07
- WILSON, Marvin Lee — director · British · appointed 2000-05-25 · resigned 2005-08-23
- YORK PLACE COMPANY NOMINEES LIMITED — corporate nominee director · appointed 2000-05-25 · resigned 2000-05-25

### Beneficial owners (Persons with Significant Control)

- Mr Anthony Martin Joyce — 75–100% shares · individual PSC — since 2024-09-20
- Mrs Helen Christine Mason — 25–50% shares · individual PSC — ceased 2024-09-20
- Mr Stuart Mason — 75–100% shares · individual PSC — ceased 2021-02-11

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/04001862
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/04001862
- companies_house_accounts — https://find-and-update.company-information.service.gov.uk/company/04001862/filing-history

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **1ST STORAGE UK LIMITED**. Human view: https://whiteintel.dev/entity/c8a6ef13-9cfe-5108-9cb7-a55879cea5bc · Structured JSON: https://whiteintel.dev/api/public/dossier/c8a6ef13-9cfe-5108-9cb7-a55879cea5bc._

_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"._