- Companies
- Electricians
- Southport
- Illumidex UK Ltd
Illumidex UK Ltd
- Company number
- 11890736
- Incorporated
- 19 Mar 20197 years trading
- Registered office
- 8 Banks Road, Southport, PR9 8JG
- Nature of business
- Electrical installation
Illumidex UK Ltd is a 7-year-old private limited company registered in Southport, company number 11890736, one of 61 electrical contractors in Southport. Its next accounts are due at Companies House on 31 December 2027, and the CT600 for the period to 31 March 2027 is due at HMRC on 31 March 2028.
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 down £19K (-19.3%) on the year before, to £79K.
- Net assets rose in 3 of 6 year-on-year comparisons on record.
- Current assets of £71K against £29K owed within a year: 2.5 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 7 years, 2020 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £79K | £71K | £29K | 2 | |
| 31 Mar 2025 | £97K | £68K | £26K | 2 | |
| 31 Mar 2024 | £106K | £70K | £24K | 2 | |
| 31 Mar 2023 | £111K | £45K | 2 | ||
| 31 Mar 2022 | £89K | £43K | £30K | 2 | |
| 31 Mar 2021 | £63K | £80K | £66K | 4 | |
| 31 Mar 2020 | -£49K | £1,659 | £21K | 0 |
Where Illumidex UK Ltd is registered
The registered office is in Southport (PR9), in the Sefton local authority area, North West. Show PR9 8JG on a map.
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- Nja Construction Services LtdProperty developers
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- Churchtown Tree Surgery LimitedLandscapers and gardeners
What happens if Illumidex UK Ltd 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 31 December 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2028 to 31 Jan 2028 | £150 |
| 1 to 3 months late | 1 Feb 2028 to 31 Mar 2028 | £375 |
| 3 to 6 months late | 1 Apr 2028 to 30 Jun 2028 | £750 |
| More than 6 months late | From 1 Jul 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2028 | £200 |
| 3 months late | 30 Jun 2028 | another £200 |
| 6 months late | 30 Sep 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 2029 | 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
- 11890736
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 19 March 2019 (7 years ago)
- Registered office
- 8 Banks Road, Southport, PR9 8JG
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 18 March 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 Southport
Other active electrical contractors registered in Southport.
- Infinelec Limited2023
- Jackson Property Services Ltd2022
- Jal Electrical Solutions Ltd2022
- JCLH Electrical Ltd2026
- Jel Electrical Limited2001
- Jel Renewables Ltd2019
- Lumono Ltd2023
- Mike Doyle Electrical Solutions Limited2017
All electrical contractors in Southport · All trades in Southport · Electricians across the UK
Frequently asked questions
When are Illumidex UK Ltd's accounts due?
Illumidex UK Ltd's next accounts are due at Companies House by 31 December 2027 (in 444 days), covering the period to 31 March 2027.
When is Illumidex UK Ltd's CT600 due?
The CT600 for the period to 31 March 2027 is due at HMRC by 31 March 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2028.
Is Illumidex UK Ltd still trading?
Illumidex UK Ltd 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 Illumidex UK Ltd do?
Illumidex UK Ltd is registered under Electrical installation (SIC 43210).
How old is Illumidex UK Ltd?
Illumidex UK Ltd was incorporated on 19 March 2019, 7 years ago.
What is the penalty if Illumidex UK Ltd 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 Illumidex UK Ltd 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.