---
title: "DIAMOND TRANSMISSION PARTNERS WALNEY EXTENSION LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/766d330f-b9a4-51f9-bbe7-d3aeb187eafc
json: https://whiteintel.dev/api/public/dossier/766d330f-b9a4-51f9-bbe7-d3aeb187eafc
identifier: oo:GB-COH-10726538
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# DIAMOND TRANSMISSION PARTNERS WALNEY EXTENSION LIMITED

**Type:** Company  
**Jurisdiction:** [GB](https://whiteintel.dev/jurisdictions/gb)  
**Identifier:** `oo:GB-COH-10726538`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/766d330f-b9a4-51f9-bbe7-d3aeb187eafc  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/766d330f-b9a4-51f9-bbe7-d3aeb187eafc  

## Cross-source identity

The same real-world entity, resolved across sources:

- **DIAMOND TRANSMISSION PARTNERS WALNEY EXTENSION LIMITED** — GLEIF · `lei:2138006VPWNH3JURXK35` — https://whiteintel.dev/entity/c7ba4750-de6c-5a92-a126-2b2261b6bba3

## Ownership & control

### Owners / controllers

- **DIAMOND TRANSMISSION PARTNERS WALNEY EXTENSION (HOLDINGS) LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/480df35f-aec0-5699-8829-b4e41765cae7
- **DIAMOND TRANSMISSION PARTNERS WALNEY EXTENSION (HOLDINGS) LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/480df35f-aec0-5699-8829-b4e41765cae7

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

A **44-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:** `10726538`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2017-04-18
- **Registered office:** 71 Kingsway, London, WC2B 6ST, United Kingdom
- **SIC:** 35120

### Officers

- BESWETHERICK, Elizabeth Jo — director · British · appointed 2020-04-06
- BROWN, Martin — director · British · appointed 2026-04-17
- DENG, Yandie — director · British · appointed 2025-07-30
- HEATH, James Christopher — director · British · appointed 2022-05-06
- NARUSE, Hiroki — director · Japanese · appointed 2026-06-30
- FOOT, David Alexander John, Mr. — director · British · appointed 2020-04-06 · resigned 2022-05-06
- IHARA, Hiromasa — director · Japanese · appointed 2017-04-18 · resigned 2018-03-26
- ITO, Akihide — director · Japanese · appointed 2022-03-29 · resigned 2026-06-30
- KOBAYASHI, Ryoji — director · Japanese · appointed 2020-04-06 · resigned 2020-11-05
- LEE, Kwansoo — director · South Korean · appointed 2017-04-18 · resigned 2020-06-10
- NISHIKAWA, Jun — director · Japanese · appointed 2020-11-05 · resigned 2021-07-02
- PITTS, Matthew John — director · British · appointed 2020-06-10 · resigned 2025-07-30
- SHIMIZU, Satoshi — director · Japanese · appointed 2017-04-18 · resigned 2017-06-30
- THORNTON, Gary — director · British · appointed 2017-10-02 · resigned 2026-04-17
- UEKI, Michiharu — director · Japanese · appointed 2021-07-02 · resigned 2022-03-29
- UMEMURA, Yasushi — director · Japanese · appointed 2018-03-26 · resigned 2020-03-31

### Beneficial owners (Persons with Significant Control)

- [Diamond Transmission Partners Walney Extension (Holdings) Limited ](https://whiteintel.dev/entity/480df35f-aec0-5699-8829-b4e41765cae7) — 75–100% shares · corporate PSC · United Kingdom — since 2017-04-18

## Provenance

- companies_house_bulk — https://find-and-update.company-information.service.gov.uk/company/10726538
- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/10726538

## Get the full, resolved dossier (agent-callable)

The above is the free teaser. The resolved **multi-hop UBO chain**, ownership **%**, full **financial history**, itemised **assets** and the hop-by-hop **exposure path** are the paid depth — callable as tools from your agent:

```bash
npx -y @whiteintel/mcp-server   # then: get_dossier · trace_ownership_path · check_offshore_exposure
```

Or unlock a one-off cited dossier for **DIAMOND TRANSMISSION PARTNERS WALNEY EXTENSION LIMITED** — https://whiteintel.dev/entity/766d330f-b9a4-51f9-bbe7-d3aeb187eafc · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **DIAMOND TRANSMISSION PARTNERS WALNEY EXTENSION LIMITED**. Human view: https://whiteintel.dev/entity/766d330f-b9a4-51f9-bbe7-d3aeb187eafc · Structured JSON: https://whiteintel.dev/api/public/dossier/766d330f-b9a4-51f9-bbe7-d3aeb187eafc._

_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"._