- Companies
- Electricians
- Graham Knowles Security Limited
Graham Knowles Security Limited
- Company number
- 04575096
- Incorporated
- 28 Oct 200223 years trading
- Registered office
- 4 Alan Grove, Heysham, Lancashire, LA3 2SQ
- Nature of business
- Electrical installation
Graham Knowles Security Limited is a 23-year-old private limited company registered in Lancashire, company number 04575096, one of the UK's electrical contractors. Its next accounts are due at Companies House on 31 July 2027, and the CT600 for the period to 31 October 2026 is due at HMRC on 31 October 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 £681 (+23.4%) on the year before, to £3,593.
- Net assets rose in 1 of 3 year-on-year comparisons on record.
- Current assets of £6,171 against £2,176 owed within a year: 2.8 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 5 years, 2018 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Oct 2025 | £3,593 | £6,171 | £2,176 | 1 | |
| 31 Oct 2024 | £2,912 | £6,753 | £3,508 | 1 | |
| 31 Oct 2023 | £3,525 | £7,002 | £3,230 | 1 | |
| 31 Oct 2019 | £2,849 | £4,771 | £3,220 | 1 | |
| 31 Oct 2018 | £4,495 | £6,667 | £4,072 | 1 |
Where Graham Knowles Security Limited is registered
The registered office is in Lancashire (LA3), in the Lancaster local authority area, North West. Show LA3 2SQ on a map.
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What happens if Graham Knowles Security 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 31 July 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Aug 2027 to 31 Aug 2027 | £150 |
| 1 to 3 months late | 1 Sep 2027 to 31 Oct 2027 | £375 |
| 3 to 6 months late | 1 Nov 2027 to 31 Jan 2028 | £750 |
| More than 6 months late | From 1 Feb 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Nov 2027 | £200 |
| 3 months late | 31 Jan 2028 | another £200 |
| 6 months late | 30 Apr 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Oct 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
- 04575096
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 28 October 2002 (23 years ago)
- Registered office
- 4 Alan Grove, Heysham, Lancashire, LA3 2SQ
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 October (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 October 2025
- Last confirmation statement
- 28 October 2025
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
Other active electrical contractors.
Frequently asked questions
When are Graham Knowles Security Limited's accounts due?
Graham Knowles Security Limited's next accounts are due at Companies House by 31 July 2027 (in 291 days), covering the period to 31 October 2026.
When is Graham Knowles Security Limited's CT600 due?
The CT600 for the period to 31 October 2026 is due at HMRC by 31 October 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 August 2027.
Is Graham Knowles Security Limited still trading?
Graham Knowles Security 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 Graham Knowles Security Limited do?
Graham Knowles Security Limited is registered under Electrical installation (SIC 43210).
How old is Graham Knowles Security Limited?
Graham Knowles Security Limited was incorporated on 28 October 2002, 23 years ago.
What is the penalty if Graham Knowles Security 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 Graham Knowles Security 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.