- Companies
- Electricians
- London
- Symosis Ltd.
Symosis Ltd.
- Company number
- 11270412
- Incorporated
- 22 Mar 20188 years trading
- Registered office
- 167-169 6366635Great Portland Street, 5TH Floor, London, W1W 5PF
- Nature of business
- Electrical installation; Other information technology service activities
Symosis Ltd. is a 8-year-old private limited company registered in London, company number 11270412, one of 3,448 electrical contractors in London. Its next accounts are due at Companies House on 31 October 2026, and its first CT600 is due at HMRC on 31 July 2026.
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 £460 (+2.1%) on the year before, to £22K.
- Net assets rose in 4 of 5 year-on-year comparisons on record.
- Current assets of £27K against £22K owed within a year: 1.2 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 6 years, 2019 to 2024.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Jul 2024 | £22K | £27K | £22K | 1 | |
| 31 Jul 2023 | £21K | £27K | £20K | 1 | |
| 31 Jul 2022 | £28K | £61K | £44K | 1 | |
| 30 Sep 2021 | £12K | £55K | £6,921 | 1 | |
| 30 Sep 2020 | £11K | £68K | £980 | 0 | |
| 31 Mar 2019 | £3,152 | £19K | £19K |
Where Symosis Ltd. is registered
The registered office is in London (W1W), in the Westminster local authority area, London. Show W1W 5PF on a map.
Other trade companies in W1W
- Civaris LtdSpecialist contractors
- R&R Construction Group LtdBuilders
- Aurum Cooling LtdPlumbers and heating engineers
- Steam Wood Stone LtdFinishing trades
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- Group Atlas Financial 83 LtdPainters and decorators
- Energy Reward LtdMotor traders
- Holly’S Housekeeping LtdCleaning companies
What happens if Symosis 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 October 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2026 to 30 Nov 2026 | £150 |
| 1 to 3 months late | 1 Dec 2026 to 31 Jan 2027 | £375 |
| 3 to 6 months late | 1 Feb 2027 to 30 Apr 2027 | £750 |
| More than 6 months late | From 1 May 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2027 | £200 |
| 3 months late | 30 Apr 2027 | another £200 |
| 6 months late | 31 Jul 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 11270412
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 March 2018 (8 years ago)
- Registered office
- 167-169 6366635Great Portland Street, 5TH Floor, London, W1W 5PF
- Nature of business
- Electrical installation (SIC 43210)
Other information technology service activities (SIC 62090) - Year end
- 31 January (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 July 2024
- Last confirmation statement
- 15 April 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 London
Other active electrical contractors registered in London.
- Synchronised Security Systems Limited2007
- Synergy Property Care Ltd2025
- Syntec Electrical Services Ltd2016
- Synth Solar Ltd2024
- System Electrics (Contracts) Limited1990
- T & H Mechanical Services Ltd2024
- T & I Facilities Limited2005
- T & L Electrics Ltd2026
All electrical contractors in London · All trades in London · Electricians across the UK
Frequently asked questions
When are Symosis Ltd.'s accounts due?
Symosis Ltd.'s next accounts are due at Companies House by 31 October 2026 (in 18 days), covering the period to 31 January 2026.
When is Symosis Ltd.'s CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 31 July 2025, due by 31 July 2026, and one for the period to 31 January 2026, due by 31 January 2027. Corporation tax is payable 9 months and 1 day after the end of each.
Is Symosis Ltd. still trading?
Symosis 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 Symosis Ltd. do?
Symosis Ltd. is registered under Electrical installation (SIC 43210); Other information technology service activities (SIC 62090).
How old is Symosis Ltd.?
Symosis Ltd. was incorporated on 22 March 2018, 8 years ago.
What is the penalty if Symosis 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 Symosis 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.