- Companies
- Electricians
- London
- NBB Rail Limited
NBB Rail Limited
- Company number
- 12440647
- Incorporated
- 4 Feb 20206 years trading
- Registered office
- 7 Bell Yard, London, WC2A 2JR
- Nature of business
- Electrical installation; Engineering related scientific and technical consulting activities; Other business support service activities n.e.c.
NBB Rail Limited is a 6-year-old private limited company registered in London, company number 12440647, one of 3,448 electrical contractors in London. 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 up £53K (+42%) on the year before, to £181K.
- Net assets rose in 5 of 5 year-on-year comparisons on record.
- Current assets of £316K against £219K owed within a year: 1.4 times cover.
- 4 employees on average during the year.
- Balance sheets on record for 6 years, 2021 to 2026.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Mar 2026 | £181K | £51K | £316K | £219K | 4 |
| 31 Mar 2025 | £127K | £44K | £174K | £93K | 4 |
| 31 Mar 2024 | £91K | £28K | £127K | £42K | 4 |
| 31 Mar 2023 | £53K | £41K | £62K | £16K | 3 |
| 31 Mar 2022 | £11K | £18K | £62K | £51K | 2 |
| 31 Mar 2021 | -£2,149 | £385 | £3,476 | £5,625 | 2 |
Where NBB Rail Limited is registered
The registered office is in London (WC2A), in the Westminster local authority area, London. Show WC2A 2JR on a map.
Other trade companies in WC2A
- Eg Cleaner Company LtdCleaning companies
- Moore's Scaffolding LtdScaffolders
- Regal Motors LimitedMechanics and garages
- Lifetime Roofing Specialist LimitedRoofers
- MJ Construction Contractor LtdBuilders
- Ridgeworks (South) LtdRoofers
- Spacex Concrete LtdProperty developers
- Nationwide Roofing & Warranty LimitedBuilders
Shared registered office
221 companies on our pages use this registered office address. An address shared this widely is usually an accountant's office or a company formation agent's service address, not where the business trades from.
What happens if NBB Rail 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 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
- 12440647
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 4 February 2020 (6 years ago)
- Registered office
- 7 Bell Yard, London, WC2A 2JR
- Nature of business
- Electrical installation (SIC 43210)
Engineering related scientific and technical consulting activities (SIC 71122)
Other business support service activities n.e.c. (SIC 82990) - Year end
- 31 March (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 March 2026
- Last confirmation statement
- 3 February 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.
- NBC Electrical Services Ltd2025
- NCCS Group Ltd2025
- Nebula Renewable Ltd2023
- Nee Electrical Ltd2022
- Neil Corry Electrical Ltd2022
- Nel Contractors Limited2025
- Nelj Ltd2021
- Nest Technology Ltd2018
All electrical contractors in London · All trades in London · Electricians across the UK
Frequently asked questions
When are NBB Rail Limited's accounts due?
NBB Rail Limited's next accounts are due at Companies House by 31 December 2027 (in 445 days), covering the period to 31 March 2027.
When is NBB Rail Limited'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 NBB Rail Limited still trading?
NBB Rail 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 NBB Rail Limited do?
NBB Rail Limited is registered under Electrical installation (SIC 43210); Engineering related scientific and technical consulting activities (SIC 71122); Other business support service activities n.e.c. (SIC 82990).
How old is NBB Rail Limited?
NBB Rail Limited was incorporated on 4 February 2020, 6 years ago.
What is the penalty if NBB Rail 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 NBB Rail 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.