DIAMOND TRANSMISSION UK LIMITED
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Next accounts due
2026-12-31 (in 7mo)
Last filed for 2025-03-31
Confirmation statement due
2026-11-06 (in 6mo)
Last made up 2025-10-23
Watchouts
Cash
—
Latest balance sheet
Net assets
—
Equity attributable
Employees
0
Average over period
Profit before tax
—
Period ending 2025-03-31
Watchouts
Facts from the Companies House register and the latest accounts — not a rating
-
3 officer resignations in last 12 months
Multiple officers have left the board recently — see the People section for who.
-
1 PSC ceased in last 24 months
Significant control changed hands — see the Ownership section.
Headcount
2-year trend · vs Utilities median
Accounts
2-year trend · latest reflected 2025-03-31
| Metric | Trend | 2024-03-31 | 2025-03-31 |
|---|---|---|---|
| Turnover | — | — | |
| Operating profit | — | — | |
| Profit before tax | — | — | |
| Net profit | — | — | |
| Cash | — | — | |
| Total assets less current liabilities | — | — | |
| Net assets | — | — | |
| Equity | — | — | |
| Average employees | — | 0 | |
| Wages | — | — |
Values shown as filed in the company's annual accounts. — indicates the figure wasn't present under that line item in that period. About these numbers
Audit & accounting basis
- Accounting basis
- IFRS
- Reporting scope
- Standalone (parent only)
- Auditor
- Deloitte LLP
- Audit opinion
- Unqualified (clean)
- Going concern
- Affirmed
“After making enquiries, the Directors have a reasonable expectation that the Company has adequate resources to continue in operational existence for the foreseeable future. Accordingly, they continue to adopt the going concern basis in preparing the Financial Statements.”
Group structure
- DIAMOND TRANSMISSION UK LIMITED · parent
- Blue Transmission Investments Limited 50%
- Blue Transmission Walney 1 (Holdings) Limited 50%
- Blue Transmission Walney 1 Limited 50%
- Blue Transmission Walney 2 Investments Limited 50%
- Blue Transmission Walney 2 (Holdings) Limited 50%
- Blue Transmission Walney 2 Limited 50%
- Blue Transmission Sheringham Shoal Investments Limited 50%
- Blue Transmission Sheringham Shoal (Holdings) Limited 50%
- Blue Transmission Sheringham Shoal Limited 50%
- Blue Transmission London Array (Holdings) Limited 50%
- Blue Transmission London Array Limited 50%
- Diamond Transmission Partners BBE (Holdings) Limited 50%
- Diamond Transmission Partners BBE Limited 50%
- Diamond Transmission Partners RB (Holdings) Limited 51%
- Diamond Transmission Partners RB Limited 51%
- Diamond Transmission Partners Galloper (Holdings) Limited 51%
- Diamond Transmission Partners Galloper Limited 51%
- Diamond Transmission Partners Hornsea One (Holdings) Limited 20%
- Diamond Transmission Partners Hornsea One Limited 20%
- Diamond Transmission Partners Walney Extension (Holdings) Limited 51%
- Diamond Transmission Partners Walney Extension Limited 51%
- Diamond Transmission Partners Hornsea Two (Holdings) Limited 25%
- Diamond Transmission Partners Hornsea Two Limited 25%
Significant events
- “Diamond Transmission Corporation Limited ("DTC") transferred its employees to DTUK from 1 November 2024.”
- “On 4 December 2024 Mitsubishi Corporation ("MC") sold 100% of it's shareholding in DTUK to DTUKBBH.”
Auditor, going-concern and subsidiary information is drawn from the narrative of the latest annual accounts. About these numbers
People
4 active · 8 resigned
| Name | Role | Appointed | Born | Nationality |
|---|---|---|---|---|
| KERRENNUER, Antione Jean Rene | Director | 2025-08-12 | May 1978 | French |
| PORTER, Mark Darren | Director | 2025-03-24 | Jun 1972 | British |
| SANDHU, Rajinder Singh Bobby, Mr. | Director | 2025-08-29 | Aug 1983 | British |
| THORNTON, Gary | Director | 2019-10-24 | Dec 1965 | British |
Show 8 resigned officers
| Name | Role | Appointed | Resigned |
|---|---|---|---|
| INANO, Shigeru | Director | 2021-04-01 | 2024-12-04 |
| KADOTA, Atsushi | Director | 2024-04-15 | 2024-12-04 |
| MURAMIYA, Masanobu | Director | 2020-08-03 | 2021-04-01 |
| O'BRIEN, David | Director | 2024-12-04 | 2025-06-30 |
| PITTS, Matthew John | Director | 2019-10-24 | 2025-07-23 |
| TETOT, Stephane Christophe | Director | 2024-12-04 | 2025-03-24 |
| UMEMURA, Yasushi | Director | 2019-10-24 | 2020-03-31 |
| VERA, Eddu | Director | 2024-12-04 | 2025-08-29 |
Ownership
Persons with significant control
| Name | Kind | Nature of control | Notified | Status |
|---|---|---|---|---|
| Dtuk Blk Bidco Holdings Ltd | Corporate entity | Shares 75–100%, Voting 75–100%, Appoints directors | 2024-12-04 | Active |
| Diamond Transmission Corporation Limited | Corporate entity | Shares 75–100%, Voting 75–100%, Appoints directors | 2019-10-24 | Ceased 2024-12-04 |
Filing timeline
Last 20 of 44 total filings
Material constitutional events — rename, articles re-file, resolution
- 2025-08-13 MA Memorandum articles
- 2025-08-13 RESOLUTIONS Resolution
| Date | Type | Category | Description | |
|---|---|---|---|---|
| 2025-12-17 | AA | accounts | Accounts with accounts type full | |
| 2025-11-05 | CS01 | confirmation-statement | Confirmation statement with updates | |
| 2025-10-09 | AD01 | address | Change registered office address company with date old address new address | |
| 2025-10-02 | AD01 | address | Change registered office address company with date old address new address | |
| 2025-09-29 | AD01 | address | Change registered office address company with date old address new address | |
| 2025-09-10 | AP01 | officers | Appoint person director company with name date | |
| 2025-09-10 | TM01 | officers | Termination director company with name termination date | |
| 2025-08-18 | AP01 | officers | Appoint person director company with name date | |
| 2025-08-13 | MA | incorporation | Memorandum articles | |
| 2025-08-13 | RESOLUTIONS | resolution | Resolution | |
| 2025-07-23 | TM01 | officers | Termination director company with name termination date | |
| 2025-07-01 | TM01 | officers | Termination director company with name termination date | |
| 2025-04-14 | AP01 | officers | Appoint person director company with name date | |
| 2025-04-14 | TM01 | officers | Termination director company with name termination date | |
| 2024-12-06 | PSC02 | persons-with-significant-control | Notification of a person with significant control | |
| 2024-12-06 | PSC07 | persons-with-significant-control | Cessation of a person with significant control | |
| 2024-12-06 | TM01 | officers | Termination director company with name termination date | |
| 2024-12-06 | TM01 | officers | Termination director company with name termination date | |
| 2024-12-05 | AP01 | officers | Appoint person director company with name date | |
| 2024-12-05 | AP01 | officers | Appoint person director company with name date |
Public-record activity
Raw counts from Companies House — last 12–24 months
- Filings
- 12
- Capital events
- 0
- Officers appointed
- 2
- Officers resigned
- 3
last 12 months
last 24 months
last 12 months
last 12 months
Direct counts from the register. No score, no rating — see the Filing timeline for the underlying events.
Year-on-year
FY2024 → FY2025 · period ending 2025-03-31 vs 2024-03-31