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Company number
12005698

DIAMOND TRANSMISSION PARTNERS HORNSEA ONE (HOLDINGS) LIMITED

Active
✓ Active company on the official register. Next accounts due 31 December 2026.

Company details

London, England Contains OS data © Crown copyright and database right. Contains Royal Mail data © Royal Mail copyright and database right. Source: Office for National Statistics licensed under the Open Government Licence v.3.0.
Registered name
DIAMOND TRANSMISSION PARTNERS HORNSEA ONE (HOLDINGS) LIMITED
Company number
12005698
Registered office
71 KINGSWAY, LONDON, WC2B 6ST, ENGLAND · 37 other companies at this postcode
Company type
Private Limited Company
Incorporated on
20 May 2019
Status
Active
Age
7 years
Nature of business (SIC)
35120 — Transmission of electricity
Accounts — next due
31 Dec 2026
Accounts — last made up to
31 Mar 2025
Confirmation statement — next due
02 Jun 2027
Confirmation statement — last
19 May 2026

What the register says

Facts from the register, with the dates they are filed under. Not a score: what they mean is for you to judge, and every line can be checked against Companies House itself.

Companies House register snapshot, read 02/09/2026.

People with significant control

Beneficial owners holding over 25% of shares, voting rights or the right to appoint directors

Chubu Electric Power Company Netherlands B.V.
owns 25–50% of shares · holds 25–50% of voting rights
Notified 23/02/2021
Chubu Global Investment B.V.
owns 25–50% of shares · holds 25–50% of voting rights
Notified 29/03/2023
Diamond Transmission Corporation Limited
owns 75–100% of shares · holds 75–100% of voting rights · can appoint and remove directors
Notified 20/05/2019
Mhc Infrastructure Uk Limited
owns 25–50% of shares · holds 25–50% of voting rights
Notified 21/06/2021

Corporate structure

Who controls this company, and who they control in turn

4 controllers Drag to move · scroll to zoom · double-click to expand
Company Person Current control Ended

Connections

Chubu Global Investment B.V. name only
owns 25–50% of shares · holds 25–50% of votes Notified 29/03/2023
Corporate owner owns 25–50% of shares · holds 25–50% of votes Notified 21/06/2021
Chubu Electric Power Company Netherlands B.V. name only
owns 25–50% of shares · holds 25–50% of votes Control ended 29/03/2023
Corporate owner owns 75–100% of shares · holds 75–100% of votes · can appoint and remove directors Control ended 21/06/2021 Controls 15 companies

Change history

Reconstructed from the dated records Companies House publishes

DateChangeWasNow
29/03/2023 Person with significant control ceased Chubu Electric Power Company Netherlands B.V.
29/03/2023 Person with significant control added Chubu Global Investment B.V.
21/06/2021 Person with significant control ceased Diamond Transmission Corporation Limited
21/06/2021 Person with significant control added Mhc Infrastructure Uk Limited
23/02/2021 Person with significant control added Chubu Electric Power Company Netherlands B.V.
20/05/2019 Person with significant control added Diamond Transmission Corporation Limited

Financial highlights

Parsed from the filed statutory accounts (£ thousands, except employees)

Source: Companies House bulk data filed accounts (iXBRL)
Metric FY2025
Employees (avg) 0

Documents for DIAMOND TRANSMISSION PARTNERS HORNSEA ONE (HOLDINGS) LIMITED

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Company extract£1.99

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Financial statements£3.99

Every figure the company’s own accounts state, across each filed period, with year-on-year movement. Most UK companies file small or micro-entity accounts — a balance sheet and a headcount, no turnover or profit.

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Ownership report£3.99

Who controls the company: persons with significant control, the nature of that control, the ownership graph and every other company those controllers hold.

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Data protection register

No entry found on the ICO register of fee payers under this name.

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Frequently asked questions

What is the company number of DIAMOND TRANSMISSION PARTNERS HORNSEA ONE (HOLDINGS) LIMITED?
According to the official registry, the company number of DIAMOND TRANSMISSION PARTNERS HORNSEA ONE (HOLDINGS) LIMITED is 12005698.
Where is DIAMOND TRANSMISSION PARTNERS HORNSEA ONE (HOLDINGS) LIMITED registered?
The registered office is 71 KINGSWAY, LONDON, WC2B 6ST, ENGLAND.
What is the SIC code of DIAMOND TRANSMISSION PARTNERS HORNSEA ONE (HOLDINGS) LIMITED?
The nature of business is recorded under SIC code 35120 — Transmission of electricity.
Who controls DIAMOND TRANSMISSION PARTNERS HORNSEA ONE (HOLDINGS) LIMITED?
Chubu Electric Power Company Netherlands B.V. is recorded as a person with significant control, and owns 25–50% of shares, holds 25–50% of voting rights.
When are the next accounts of DIAMOND TRANSMISSION PARTNERS HORNSEA ONE (HOLDINGS) LIMITED due?
The next annual accounts are due by 31 December 2026, and the last accounts were made up to 31 March 2025.

About DIAMOND TRANSMISSION PARTNERS HORNSEA ONE (HOLDINGS) LIMITED (12005698)

DIAMOND TRANSMISSION PARTNERS HORNSEA ONE (HOLDINGS) LIMITED is a private limited company incorporated on 20 May 2019 and registered in the United Kingdom under company number 12005698. Its registered office is at 71 KINGSWAY, LONDON, WC2B 6ST, ENGLAND. The recorded nature of business is transmission of electricity (SIC 35120). The company is currently active , with statutory accounts last made up to 31 March 2025. , and the person with significant control is Chubu Electric Power Company Netherlands B.V.. This profile is provided by opendata.bot by Noetikos, aggregating official data from Companies House bulk data , last refreshed 2 September 2026.

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