---
title: "Diane Joan Southam — Ownership Dossier"
canonical: https://whiteintel.dev/entity/dcd8d4f0-e668-406f-b19e-2c37ac2ab887
json: https://whiteintel.dev/api/public/dossier/dcd8d4f0-e668-406f-b19e-2c37ac2ab887
identifier: psc:P8T5mbxwU7vPXtOjhrtwES4xaZE
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Diane Joan Southam

**Type:** Person  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `psc:P8T5mbxwU7vPXtOjhrtwES4xaZE`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/dcd8d4f0-e668-406f-b19e-2c37ac2ab887  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/dcd8d4f0-e668-406f-b19e-2c37ac2ab887  

## Ownership & control

### Holdings / subsidiaries

- **SEMPRA HOMES LIMITED** (beneficial owner) — https://whiteintel.dev/entity/ddfaf37d-7572-5224-8e1b-e65909045802

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Diane Joan Southam**. Human view: https://whiteintel.dev/entity/dcd8d4f0-e668-406f-b19e-2c37ac2ab887 · Structured JSON: https://whiteintel.dev/api/public/dossier/dcd8d4f0-e668-406f-b19e-2c37ac2ab887._

_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"._