BW ESS DEVELOPMENT UK LIMITED
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Cash
£1.4m
-52.7% vs 2024
Net assets
-£1m
-116.6% lowest in 6 filed years
Employees
18
+63.6% highest in 6 filed years
Profit before tax
-£8m
-782.9% lowest in 3 filed years
Watchouts
Facts from the Companies House register and the latest accounts — not a rating
-
2 PSCs ceased in last 24 months
Significant control changed hands — see the Ownership section.
-
Negative shareholders' funds
Net assets
6-year trend · vs Industrials median
Accounts
6-year trend · Δ = latest vs prior filed period · latest reflected 2025-12-31
| Metric | Trend | 2020-12-31 | 2021-12-31 | 2022-12-31 | 2023-12-31 | 2024-12-31 | 2025-12-31 | Δ vs prior |
|---|---|---|---|---|---|---|---|---|
| Turnover | — | — | — | — | £1,593,978 | £45,699 | -97.1% | |
| Operating profit | — | — | — | -£1,615,422 | -£959,985 | -£8,120,304 | -745.9% | |
| Profit before tax | — | — | — | -£1,479,857 | -£905,070 | -£7,990,774 | -782.9% | |
| Net profit | — | — | — | -£558,819 | -£753,049 | -£7,206,272 | -856.9% | |
| Cash | £578,970 | £6,282,617 | £1,471,324 | £4,655,769 | £2,958,309 | £1,398,469 | -52.7% | |
| Total assets less current liabilities | £125,083 | £6,143,027 | £4,286,976 | £6,227,725 | £6,182,255 | -£705,903 | -111.4% | |
| Net assets | £80,149 | £6,107,863 | £4,286,543 | £6,227,725 | £6,182,255 | -£1,024,017 | -116.6% | |
| Equity | £80,149 | £6,107,863 | £4,286,543 | — | — | -£1,024,017 | — | |
| Average employees | 2 | 3 | 6 | 9 | 11 | 18 | +63.6% | |
| Wages | — | — | — | £1,099,968 | £1,272,689 | £2,419,406 | +90.1% | |
| Directors' remuneration | — | — | — | £627,776 | £368,575 | £255,801 | -30.6% |
Values shown as filed in the company's annual accounts. — indicates the figure wasn't present under that line item in that period. The Δ column is the change from the prior filed period as a percentage of |prior|; lines a company doesn't report show —. About these numbers
Ratios
Computed from the line items above — sparklines read oldest → newest
| Ratio | Trend | 2020-12-31 | 2021-12-31 | 2022-12-31 | 2023-12-31 | 2024-12-31 | 2025-12-31 |
|---|---|---|---|---|---|---|---|
| Operating margin | — | — | — | — | -60.2% | — | |
| Net margin | — | — | — | — | -47.2% | — | |
| Return on capital employed | — | — | — | -25.9% | -15.5% | — | |
| Gearing (liabilities / total assets) | 86.3% | 4.6% | 7.0% | 5.0% | 6.7% | 110.0% | |
| Current ratio | — | — | — | 17.14x | 11.19x | 0.73x |
Margins divide P&L lines by turnover. Gearing is liabilities over total assets. Current ratio is current assets over creditors falling due within one year. Interest cover is operating profit over absolute finance costs. Margin ratios are hidden where reported turnover is too small relative to profit to yield a meaningful figure — typical of holding companies whose income is mostly subsidiary dividends rather than trading revenue. Sector-distribution context coming next.
Name history
Renamed 1 time since incorporation
- BW ESS DEVELOPMENT UK LIMITED 2025-01-02 → present
- PENSO POWER LIMITED 2017-12-22 → 2025-01-02
Audit & accounting basis
- Accounting basis
- IFRS
- Reporting scope
- Standalone (parent only)
- Auditor
- MHA
- Audit opinion
- Unqualified (clean)
- Going concern
- Affirmed
“The financial statements have been prepared on the going concern basis. The company had net liabilities of £1,024,017 at the balance sheet date. The company is supported by BW ESS Limited an intermediate parent company which has adequate resources to continue to provide support”
Group structure
- BW ESS DEVELOPMENT UK LIMITED · parent
- Marchwood Battery Storage Limited 100%
- Stonehill Battery Storage Limited 100%
- Cowley Battery Storage Limited 100%
- Elstree Battery Storage Limited 100%
- BW ESS Australia Pty Ltd 100%
Significant events
- “The name of the company was changed from Penso Power Limited to BW ESS Development UK Limited on 2 January 2025.”
- “During the year, the company disposed of its 33.33% shareholding in ACL SPV 1 S.R.L. representing a nominal value of £552,400.”
- “During the year, following a group reorganisation, the company disposed of its 49% holding in Bramley Battery Storage Limited, its 20.29% holding in Welbar Energy Storage Limited and its 100% holding in Berkswell Battery Storage Limited at cost.”
Auditor, going-concern and subsidiary information is drawn from the narrative of the latest annual accounts. About these numbers
People
5 active · 7 resigned
| Name | Role | Appointed | Born | Nationality |
|---|---|---|---|---|
| CHWEE, Chong Foon, Ms. | Secretary | 2024-12-13 | — | — |
| TEH, Linda Keat Luan, Ms. | Secretary | 2024-12-13 | — | — |
| BIRD & BIRD COMPANY SECRETARIES LIMITED | Corporate Secretary | 2024-12-10 | — | — |
| FORTH, Cordelia Clare | Director | 2026-03-27 | Sep 1984 | British |
| THWAITES, Richard Craig | Director | 2017-12-22 | Oct 1970 | British |
Show 7 resigned officers
| Name | Role | Appointed | Resigned |
|---|---|---|---|
| GAY, Gary Alvin | Director | 2017-12-22 | 2018-07-05 |
| JIA, Nan, Dr | Director | 2021-07-21 | 2024-10-11 |
| JIMENEZ CHAVES, Roberto | Director | 2024-01-29 | 2026-03-27 |
| MCALEAVEY, John Andrew, Mr. | Director | 2020-03-25 | 2023-09-22 |
| NYGARD, Erik Michael | Director | 2021-01-11 | 2021-12-23 |
| STROEMSOE, Erik | Director | 2021-10-21 | 2024-10-11 |
| WYBREW, John Bryan | Director | 2017-12-22 | 2024-10-11 |
Ownership
Persons with significant control
| Name | Kind | Nature of control | Notified | Status |
|---|---|---|---|---|
| Mr Andreas Sohmen-Pao | Individual | Significant influence | 2024-01-02 | Active |
| Bw Energy Storage Systems Pte. Ltd | Corporate entity | Shares 25–50% | 2021-11-15 | Ceased 2024-01-02 |
| Dr Nan Jia | Individual | Significant influence | 2021-07-16 | Ceased 2024-10-11 |
| Mr. John Andrew Mcaleavey | Individual | Significant influence | 2020-04-01 | Ceased 2024-03-05 |
| Mr Richard Craig Thwaites | Individual | Significant influence | 2019-02-01 | Ceased 2024-10-11 |
| Creation Energy Storage Limited | Corporate entity | Shares 25–50% | 2017-12-22 | Ceased 2019-02-01 |
| G2 Energy Developments Limited | Corporate entity | Shares 25–50% | 2017-12-22 | Ceased 2018-06-29 |
Filing timeline
Last 20 of 78 total filings
Material constitutional events — rename, articles re-file, resolution
- 2025-01-02 CERTNM Certificate change of name company PDF
- 2024-11-20 RESOLUTIONS Resolution
| Date | Type | Category | Description | |
|---|---|---|---|---|
| 2026-09-21 | CS01 | confirmation-statement | Confirmation statement with no updates | |
| 2026-09-18 | AA | accounts | Accounts with accounts type full | |
| 2026-07-23 | CH01 | officers | Change person director company with change date | |
| 2026-06-09 | AD01 | address | Change registered office address company with date old address new address | |
| 2026-03-30 | TM01 | officers | Termination director company with name termination date | |
| 2026-03-30 | AP01 | officers | Appoint person director company with name date | |
| 2025-12-19 | AA | accounts | Accounts with accounts type full | |
| 2025-09-22 | CS01 | confirmation-statement | Confirmation statement with updates | |
| 2025-09-17 | CH01 | officers | Change person director company with change date | |
| 2025-07-18 | AD01 | address | Change registered office address company with date old address new address | |
| 2025-07-18 | AD03 | address | Move registers to sail company with new address | |
| 2025-07-17 | AD02 | address | Change sail address company with new address | |
| 2025-07-11 | RP04AP01 | officers | Second filing of director appointment with name | |
| 2025-06-09 | AD01 | address | Change registered office address company with date old address new address | |
| 2025-01-02 | CERTNM | change-of-name | Certificate change of name company | |
| 2025-01-02 | AD01 | address | Change registered office address company with date old address new address | |
| 2024-12-20 | AP03 | officers | Appoint person secretary company with name date | |
| 2024-12-20 | AP03 | officers | Appoint person secretary company with name date | |
| 2024-12-20 | AP04 | officers | Appoint corporate secretary company with name date | |
| 2024-11-20 | RESOLUTIONS | resolution | Resolution |
Public-record activity
Raw counts from Companies House — last 12–24 months
- Filings
- 7
- Capital events
- 0
- Officers appointed
- 1
- Officers resigned
- 1
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.