---
title: "A & J MACKAY PLUMBING & HEATING LTD — Ownership Dossier"
canonical: https://whiteintel.dev/entity/5bebb40e-e1c3-59c3-9a72-dffe96a95e87
json: https://whiteintel.dev/api/public/dossier/5bebb40e-e1c3-59c3-9a72-dffe96a95e87
identifier: oo:GB-COH-SC336614
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# A & J MACKAY PLUMBING & HEATING LTD

**Type:** Company  
**Jurisdiction:** GB  
**Identifier:** `oo:GB-COH-SC336614`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/5bebb40e-e1c3-59c3-9a72-dffe96a95e87  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/5bebb40e-e1c3-59c3-9a72-dffe96a95e87  

## Ownership & control

### Owners / controllers

- **Mrs Jacqueline Mckay** (beneficial owner) — 50% — https://whiteintel.dev/entity/8d764637-9048-562a-adc2-fc70ea108d4e
- **Angus Stewart Mackay** (beneficial owner) — 75% — https://whiteintel.dev/entity/5932e5da-c132-5ec3-8816-0a836894dc75
- **Mrs Jacqueline Mckay** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/d56ec86c-d200-4472-83c8-1482e47a6c01
- **Angus Stewart Mackay** (beneficial owner) — 62.5% — https://whiteintel.dev/entity/4a45e81c-063b-43a4-a99b-d85ffbdfd583

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

1. **Mrs Jacqueline Mckay** — beneficial owner 50% → *A & J MACKAY PLUMBING & HEATING LTD*
1. **Angus Stewart Mackay** — beneficial owner 75% → *A & J MACKAY PLUMBING & HEATING LTD*
1. **Mrs Jacqueline Mckay** — beneficial owner 37.5% → *A & J MACKAY PLUMBING & HEATING LTD*
1. **Angus Stewart Mackay** — beneficial owner 62.5% → *A & J MACKAY PLUMBING & HEATING LTD*

## Company profile (live · UK Companies House)

- **Company number:** `SC336614`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2008-01-23
- **Registered office:** Langmay House Bridgend, Watten, Wick, Caithness, KW1 5UH, Scotland
- **SIC:** 43220

### Officers

- MACKAY, Lauren — secretary · appointed 2026-05-26
- MACKAY, Angus Stewart — director · British · appointed 2008-01-23
- MCKAY, Jacqueline — secretary · British · appointed 2008-01-23 · resigned 2026-05-26

### Beneficial owners (Persons with Significant Control)

- Angus Stewart Mackay — 50–75% shares · individual PSC · Scotland — since 2016-04-06
- Mrs Jacqueline Mckay — 25–50% shares · individual PSC · Scotland — ceased 2023-09-26

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/SC336614

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **A & J MACKAY PLUMBING & HEATING LTD**. Human view: https://whiteintel.dev/entity/5bebb40e-e1c3-59c3-9a72-dffe96a95e87 · Structured JSON: https://whiteintel.dev/api/public/dossier/5bebb40e-e1c3-59c3-9a72-dffe96a95e87._

_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"._