- Companies
- Machinery repair and installation
- London
- Open Interval Limited
Open Interval Limited
- Company number
- 11868420
- Incorporated
- 8 Mar 20197 years trading
- Registered office
- Flat 161, Russell Court, Woburn Place, London, WC1H 0LR
- Nature of business
- Repair of electronic and optical equipment; Management consultancy activities other than financial management; Research and experimental development on biotechnology; Other research and experimental development on natural sciences and engineering
Open Interval Limited is a 7-year-old private limited company registered in London, company number 11868420, one of 1,743 machinery repair and installation companies in London. Its next accounts are due at Companies House on 31 December 2026, and the CT600 for the period to 31 March 2026 is due at HMRC on 31 March 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 £3,539 (-24.1%) on the year before, to -£18K.
- Net assets rose in 1 of 5 year-on-year comparisons on record.
- Current assets of £3,203 against £21K owed within a year: 0.1 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 6 years, 2020 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2025 | -£18K | £3,203 | £21K | 2 | |
| 31 Mar 2024 | -£15K | £1,073 | £12K | 2 | |
| 31 Mar 2023 | -£11K | £972 | £4,966 | 2 | |
| 31 Mar 2022 | -£8,018 | £1,589 | £2,417 | 2 | |
| 31 Mar 2021 | -£813 | £9,954 | £635 | 2 | |
| 31 Mar 2020 | -£5,604 | £2,943 | £9,009 |
Where Open Interval Limited is registered
The registered office is in London (WC1H), in the Camden local authority area, London. Show WC1H 0LR on a map.
Other trade companies in WC1H
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- IT Service Specialists LtdRepair services
- Direct Domestic Repairs LtdRepair services
- Vertex Group Services LtdCivil engineering
- The Immobilizer Lab LtdMotor traders
- BD Brook Hill 2 LtdBuilders
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- Bruckland Group LtdBuilders
What happens if Open Interval 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 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Jan 2027 to 31 Jan 2027 | £150 |
| 1 to 3 months late | 1 Feb 2027 to 31 Mar 2027 | £375 |
| 3 to 6 months late | 1 Apr 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Apr 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Mar 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
- 11868420
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 8 March 2019 (7 years ago)
- Registered office
- Flat 161, Russell Court, Woburn Place, London, WC1H 0LR
- Nature of business
- Repair of electronic and optical equipment (SIC 33130)
Management consultancy activities other than financial management (SIC 70229)
Research and experimental development on biotechnology (SIC 72110)
Other research and experimental development on natural sciences and engineering (SIC 72190) - Year end
- 31 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 7 March 2026
Filing notes for machinery repair and installation companies
Machinery repair and installation companies often carry parts stock and specialist tools, and many work on contracts that span the year end.
Similar companies in London
Other active machinery repair and installation companies registered in London.
- Optimak Stu Limited2026
- Optimise Power Ltd2021
- Optimum Climate Control Ltd2015
- Orange Lift Installations Limited2023
- Osama Energy Limited2025
- Otd Trading Limited2025
- Ovi Mobile Mechanic Ltd2026
- Ovs Recycling Ltd2024
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Frequently asked questions
When are Open Interval Limited's accounts due?
Open Interval Limited's next accounts are due at Companies House by 31 December 2026 (in 80 days), covering the period to 31 March 2026.
When is Open Interval Limited's CT600 due?
The CT600 for the period to 31 March 2026 is due at HMRC by 31 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 January 2027.
Is Open Interval Limited still trading?
Open Interval 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 Open Interval Limited do?
Open Interval Limited is registered under Repair of electronic and optical equipment (SIC 33130); Management consultancy activities other than financial management (SIC 70229); Research and experimental development on biotechnology (SIC 72110); Other research and experimental development on natural sciences and engineering (SIC 72190).
How old is Open Interval Limited?
Open Interval Limited was incorporated on 8 March 2019, 7 years ago.
What is the penalty if Open Interval 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 Open Interval 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.