---
title: "MAS CONSTRUCTION AND DRAINAGE LTD — Ownership Dossier"
canonical: https://whiteintel.dev/entity/52ea48f7-d8a3-58f0-8c19-0b1cd5657292
json: https://whiteintel.dev/api/public/dossier/52ea48f7-d8a3-58f0-8c19-0b1cd5657292
identifier: oo:GB-COH-12692365
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# MAS CONSTRUCTION AND DRAINAGE LTD

**Type:** Company  
**Jurisdiction:** GB  
**Identifier:** `oo:GB-COH-12692365`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/52ea48f7-d8a3-58f0-8c19-0b1cd5657292  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/52ea48f7-d8a3-58f0-8c19-0b1cd5657292  

## Ownership & control

### Owners / controllers

- **Mr Marc Sinclair** (beneficial owner) — 50% — https://whiteintel.dev/entity/ef7e0e14-6490-538f-ac86-b32e090e0a2a
- **Mrs Ashlee Marie Sinclair** (beneficial owner) — 50% — https://whiteintel.dev/entity/80898b23-ff43-5853-b64c-e549e651ffc4
- **Mr Marc Sinclair** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/4ac8903f-26bb-4471-93bc-0335a30220eb
- **Mrs Ashlee Marie Sinclair** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/06a7183b-9cec-4f7a-a305-a78d0ea79acd

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

1. **Mr Marc Sinclair** — beneficial owner 50% → *MAS CONSTRUCTION AND DRAINAGE LTD*
1. **Mrs Ashlee Marie Sinclair** — beneficial owner 50% → *MAS CONSTRUCTION AND DRAINAGE LTD*
1. **Mr Marc Sinclair** — beneficial owner 37.5% → *MAS CONSTRUCTION AND DRAINAGE LTD*
1. **Mrs Ashlee Marie Sinclair** — beneficial owner 37.5% → *MAS CONSTRUCTION AND DRAINAGE LTD*

## Company profile (live · UK Companies House)

- **Company number:** `12692365`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2020-06-23
- **Registered office:** 21 Ferrous Way, North Hykeham, Lincoln, LN6 9ZN, England
- **SIC:** 42990

### Officers

- SINCLAIR, Ashlee Marie — director · British · appointed 2022-10-01
- SINCLAIR, Marc Alan — director · British · appointed 2020-06-23
- DOLBY, Ian Keith — secretary · appointed 2020-06-23 · resigned 2022-08-02

### Beneficial owners (Persons with Significant Control)

- Mrs Ashlee Marie Sinclair — 25–50% shares · individual PSC · England — since 2022-10-01
- Mr Marc Sinclair — 25–50% shares · individual PSC · England — since 2020-06-23

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/12692365
- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/12692365

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **MAS CONSTRUCTION AND DRAINAGE LTD**. Human view: https://whiteintel.dev/entity/52ea48f7-d8a3-58f0-8c19-0b1cd5657292 · Structured JSON: https://whiteintel.dev/api/public/dossier/52ea48f7-d8a3-58f0-8c19-0b1cd5657292._

_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"._