- Companies
- Electricians
- Thame
- Critical Power Supplies Limited
Critical Power Supplies Limited
- Company number
- 07024862
- Incorporated
- 21 Sep 200917 years trading
- Registered office
- The Malthouse Mill Lane, Scotsgrove, Thame, Oxfordshire, OX9 3RP
- Nature of business
- Electrical installation; Wholesale of electronic and telecommunications equipment and parts; Other information technology service activities
Critical Power Supplies Limited is a 17-year-old private limited company registered in Thame, company number 07024862, one of 10 electrical contractors in Thame. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Finances
From each year's balance sheet filed at Companies House. Small companies do not have to publish turnover or profit, so these are balance sheet figures.
- Net assets up £269K on the year before, to £270K.
- Net assets rose in 6 of 9 year-on-year comparisons on record.
- 11 employees on average, down from 14 the year before.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £270K | £453K | £1.3M | 11 | |
| 31 Dec 2024 | £1,709 | £235K | £1.1M | 14 | |
| 31 Dec 2023 | £248K | £746K | £1.7M | £1.3M | 12 |
| 31 Dec 2022 | £238K | £890K | £2M | £1.6M | 12 |
| 31 Dec 2021 | £67K | £564K | £1.3M | £986K | 9 |
| 31 Dec 2020 | £705 | £99K | £815K | £777K | 9 |
| 31 Dec 2019 | £19K | £163K | £842K | £838K | 9 |
| 31 Dec 2018 | £9,215 | £17K | £702K | £711K | |
| 31 Dec 2017 | £7,191 | £48K | £1.1M | £1.1M | |
| 31 Dec 2016 | £72K | £2,741 |
Who runs and owns Critical Power Supplies Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (3)
| Name | Role | Appointed |
|---|---|---|
| J*** K*** | Director | Sep 2009 |
| S*** K*** | Director | Apr 2026 |
| K*** K*** | Secretary | Sep 2024 |
5 former officers
| Name | Role | Appointed | Left |
|---|---|---|---|
| R*** K*** | Secretary | Sep 2009 | Jan 2010 |
| Waterlow Secretaries Limited | Secretary (company) | Sep 2009 | Sep 2009 |
| D*** D*** | Director | Sep 2009 | Sep 2009 |
| R*** K*** | Director | Sep 2009 | Jan 2010 |
| S*** K*** | Director | Dec 2018 | Mar 2026 |
Person with significant control
Public contracts won
Critical Power Supplies Limited has 4 public sector contract awards on record; the ones with their own published value total £145K, from 2019 to 2025. Source: Contracts Finder and Find a Tender award notices. 2 of these were matched by the company's exact name because the notice gave no company number.
Awards by year
Main buyers
- UK Shared Business Services Limited2 awards
- NPL Management Limited1 award
- Serious Fraud Office1 award
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| NPL Management Limited | APC Smart UPS Power Supply | £67K | 4 Jun 2025 |
| UK Shared Business Services Limited | BE24170 - Battery Replacement of UPS | £43K | 31 Jul 2024 |
| UK Shared Business Services Limited | GSS24068 20kVA Riello Sentryum S3M Compact | £16K | 25 Jan 2024 |
| Serious Fraud Office | Supply of Riello Units and Siteworks | £19K | 19 Mar 2019 |
Where Critical Power Supplies Limited is registered
The registered office is in Thame (OX9), in the Buckinghamshire local authority area, South East. Show OX9 3RP on a map.
Other trade companies in OX9
- CSG Recovery LtdMechanics and garages
- D Brayne Plumbing and Heating LimitedPlumbers and heating engineers
- Fleet Choice Commercials LtdMachinery repair and installation
- Watson Land and Property LtdProperty developers
- Ces Electrical Installations LimitedElectricians
- Watch Doctors LimitedRepair services
- Collender Walton Landscaping LtdLandscapers and gardeners
- N Greenaway Construction LtdBuilders
What happens if Critical Power Supplies Limited files late
Companies House charges an automatic penalty the day after the deadline, and it rises the longer the accounts are late. These are the dates for this company's accounts due on 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 2028 | another 10% of any unpaid tax |
For returns filed on or after 1 April 2026. Late three times in a row and the £200 penalties become £1,000 each.
Company details
As held on the Companies House register.
- Company number
- 07024862
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 21 September 2009 (17 years ago)
- Registered office
- The Malthouse Mill Lane, Scotsgrove, Thame, Oxfordshire, OX9 3RP
- Nature of business
- Electrical installation (SIC 43210)
Wholesale of electronic and telecommunications equipment and parts (SIC 46520)
Other information technology service activities (SIC 62090) - Year end
- 31 December (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 4 September 2026
Filing notes for electrical contractors
Electrical contracting companies are often a director plus a van and tools. Most fall within the micro-entity rules, so the accounts filed at Companies House are short, and the CT600 carries the tax detail.
Similar companies in Thame
Other active electrical contractors registered in Thame.
- DMD Electrical Installations Limited2016
- Electrical and Zero Emissions Limited2021
- JRS Electrical Services Limited2015
- MJC Electrical & Security Services Limited2008
- N J F Electrical Services Limited2019
- S.A.F.E.T. Services Limited2006
- Smart Electrical Services Oxfordshire Limited2024
- Techelec Installations Ltd2007
All electrical contractors in Thame · All trades in Thame · Electricians across the UK
Frequently asked questions
When are Critical Power Supplies Limited's accounts due?
Critical Power Supplies Limited's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is Critical Power Supplies Limited's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is Critical Power Supplies Limited still trading?
Critical Power Supplies Limited is listed as active on the Companies House register as of 1 Oct 2026. Active means it has not been dissolved or entered insolvency; it does not show whether it is currently taking on work.
What does Critical Power Supplies Limited do?
Critical Power Supplies Limited is registered under Electrical installation (SIC 43210); Wholesale of electronic and telecommunications equipment and parts (SIC 46520); Other information technology service activities (SIC 62090).
How old is Critical Power Supplies Limited?
Critical Power Supplies Limited was incorporated on 21 September 2009, 17 years ago.
Who runs Critical Power Supplies Limited?
Critical Power Supplies Limited has 2 active directors, the longest-serving appointed in Sep 2009. Their names and service addresses are on the Companies House register.
Who owns Critical Power Supplies Limited?
One person or company has significant control of Critical Power Supplies Limited: an individual (owns 75% or more of the shares).
Has Critical Power Supplies Limited won public sector contracts?
Yes. Critical Power Supplies Limited has 4 contract awards from public bodies on Contracts Finder and Find a Tender (those with their own published value total £145K), most recently from NPL Management Limited.
What is the penalty if Critical Power Supplies Limited files its accounts late?
Companies House charges £150 if the accounts are up to 1 month late, £375 up to 3 months, £750 up to 6 months and £1,500 after that, doubled if the previous year's accounts were also late. HMRC charges £200 for a CT600 filed a day late and another £200 at 3 months.
Official records
View Critical Power Supplies Limited on Companies House for filed documents, officers and the full history.
Based on the Companies House register (snapshot 1 Oct 2026). Deadlines are worked out from the register and assume a standard accounting period; a change of year end or a short period moves them. This page is general information, not tax or accountancy advice.