- Companies
- Electricians
- Ruislip
- Seriatim Limited
Seriatim Limited
- Company number
- 03734746
- Incorporated
- 17 Mar 199927 years trading
- Registered office
- 54-60 Morrit House ,Station Approach, South Ruislip, Ruislip, HA4 6SA
- Nature of business
- Electrical installation
Seriatim Limited is a 27-year-old private limited company registered in Ruislip, company number 03734746, one of 89 electrical contractors in Ruislip. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 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 down £73K (-9.6%) on the year before, to £685K.
- Net assets rose in 4 of 8 year-on-year comparisons on record.
- Current assets of £1.3M against £644K owed within a year: 2.0 times cover.
- 4 employees on average, down from 5 the year before.
- Balance sheets on record for 9 years, 2017 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 May 2025 | £685K | £1.2M | £1.3M | £644K | 4 |
| 30 Nov 2023 | £758K | £274K | £814K | £94K | 5 |
| 31 Jan 2023 | £869K | £798K | £1M | £185K | 5 |
| 30 Jun 2022 | £833K | £519K | £834K | £9,082 | 5 |
| 30 Jun 2021 | £838K | £686K | £841K | £14K | 5 |
| 30 Jun 2020 | £1M | £674K | £1.1M | £64K | 10 |
| 30 Jun 2019 | £879K | £405K | £1M | £180K | 10 |
| 30 Jun 2018 | £603K | £128K | £764K | £178K | 10 |
| 30 Jun 2017 | £343K | £120K | £416K | £75K | 10 |
Where Seriatim Limited is registered
The registered office is in Ruislip (HA4), in the Hillingdon local authority area, London. Show HA4 6SA on a map.
Other trade companies in HA4
- SSC London LtdGroundworks and demolition
- DCR Industriltdal LtdPainters and decorators
- Katardino Monten for General Contracting and Supplies LtdCivil engineering
- Apex Build & Move LtdBuilders
- Ridgeway Building Contracts LimitedProperty developers
- Azya Farah LtdBuilders
- Howdens Roofing & Guttering LimitedRoofers
- Vetro Glazing LimitedGlaziers
What happens if Seriatim 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 03734746
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 17 March 1999 (27 years ago)
- Registered office
- 54-60 Morrit House ,Station Approach, South Ruislip, Ruislip, HA4 6SA
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 15 May 2026
- Charges (mortgages)
- 2 outstanding of 2 registered
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 Ruislip
Other active electrical contractors registered in Ruislip.
- Shield Fire Protection Services Limited2025
- Smarts and Sparks Ltd2019
- Smudger Electrical Limited2007
- Sparkwright Electrical Services Limited2012
- Static Electrical Services Limited2014
- Strucktor UK Limited2015
- Tapley Technical Ltd.2018
- Tom Grayley Electricals Ltd2017
All electrical contractors in Ruislip · All trades in Ruislip · Electricians across the UK
Frequently asked questions
When are Seriatim Limited's accounts due?
Seriatim Limited's next accounts are due at Companies House by 28 February 2027 (in 138 days), covering the period to 31 May 2026.
When is Seriatim Limited's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is Seriatim Limited still trading?
Seriatim 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 Seriatim Limited do?
Seriatim Limited is registered under Electrical installation (SIC 43210).
How old is Seriatim Limited?
Seriatim Limited was incorporated on 17 March 1999, 27 years ago.
What is the penalty if Seriatim 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 Seriatim 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.