---
title: "CONSTRUCTION CDM SERVICES LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/bb239e74-ed6a-5915-b1cd-b9f41a151d4e
json: https://whiteintel.dev/api/public/dossier/bb239e74-ed6a-5915-b1cd-b9f41a151d4e
identifier: oo:GB-COH-11339489
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# CONSTRUCTION CDM SERVICES LIMITED

**Type:** Company  
**Jurisdiction:** GB  
**Identifier:** `oo:GB-COH-11339489`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/bb239e74-ed6a-5915-b1cd-b9f41a151d4e  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/bb239e74-ed6a-5915-b1cd-b9f41a151d4e  

## Ownership & control

### Owners / controllers

- **Mr Alastair Bruce Duncan** (beneficial owner) — 50% — https://whiteintel.dev/entity/34fe208e-9c47-5aa2-ad92-daa9a77dfe6d
- **Mr Mark Andrew Mahon** (beneficial owner) — 50% — https://whiteintel.dev/entity/d8644b0d-d671-5cde-a1ef-f4781f248f57
- **Mr Ian Victor Watson** (beneficial owner) — 50% — https://whiteintel.dev/entity/2f79cc9d-8d89-59e8-af24-4fc162253ca2
- **Mr Alastair Bruce Duncan** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/b87c22b5-90b8-4393-9050-4bf085e1af61
- **Mr Mark Andrew Mahon** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/1f1e05da-5ce0-4265-bfdb-ed08c3851056
- **Mr Ian Victor Watson** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/3395997e-99f8-4f8e-a6e4-65e5d20d64bc

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

A **6-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:** `11339489`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2018-05-01
- **Registered office:** The Roller Mill, Mill Lane, Uckfield, TN22 5AA, England
- **SIC:** 82990

### Officers

- MAHON, Joanne — secretary · appointed 2021-07-16
- DUNCAN, Alastair Bruce — director · British · appointed 2018-05-01
- MAHON, Mark Andrew — director · British · appointed 2018-05-01
- MORRIS, Nicola Joanne — secretary · appointed 2018-06-04 · resigned 2021-07-16
- WATSON, Ian Victor — director · British · appointed 2018-05-01 · resigned 2020-06-30

### Beneficial owners (Persons with Significant Control)

- Mr Alastair Bruce Duncan — 25–50% shares · individual PSC · England — since 2018-05-01
- Mr Mark Andrew Mahon — 25–50% shares · individual PSC · England — since 2018-05-01
- Mr Ian Victor Watson — 25–50% shares · individual PSC · England — ceased 2020-06-30

## Provenance

- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/11339489
- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/11339489

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **CONSTRUCTION CDM SERVICES LIMITED**. Human view: https://whiteintel.dev/entity/bb239e74-ed6a-5915-b1cd-b9f41a151d4e · Structured JSON: https://whiteintel.dev/api/public/dossier/bb239e74-ed6a-5915-b1cd-b9f41a151d4e._

_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"._