- Companies
- Electricians
- Welwyn Garden City
- Blackshire Services Ltd
Blackshire Services Ltd
- Company number
- 17203479
- Incorporated
- 6 May 2026
- Registered office
- 36 Chequersfield, Welwyn Garden City, AL7 4QY
- Nature of business
- Electrical installation; General cleaning of buildings
Blackshire Services Ltd is a newly incorporated private limited company registered in Welwyn Garden City, company number 17203479, one of 50 electrical contractors in Welwyn Garden City. Its next accounts are due at Companies House on 6 February 2028, and its first CT600 is due at HMRC on 5 May 2028.
Key dates
This company has not filed accounts yet. First accounts are due 21 months after incorporation, and the first period can run longer than a year.
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Where Blackshire Services Ltd is registered
The registered office is in Welwyn Garden City (AL7), in the Welwyn Hatfield local authority area, East of England. Show AL7 4QY on a map.
Other trade companies in AL7
- Mechanicalwise LtdInstallers
- Azalea Services LimitedSpecialist contractors
- Malmech and Mannion LimitedMechanics and garages
- T&D Construction Group LtdFinishing trades
- Vertec Roofing and Building LtdRoofers
- Selectlane LtdMotor traders
- Af Pressure Washing LtdCleaning companies
- Jet Professional LtdCleaning companies
What happens if Blackshire Services 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 6 February 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 7 Feb 2028 to 6 Mar 2028 | £150 |
| 1 to 3 months late | 7 Mar 2028 to 6 May 2028 | £375 |
| 3 to 6 months late | 7 May 2028 to 6 Aug 2028 | £750 |
| More than 6 months late | From 7 Aug 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2028 | £200 |
| 3 months late | 31 Aug 2028 | another £200 |
| 6 months late | 30 Nov 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 17203479
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 6 May 2026
- Registered office
- 36 Chequersfield, Welwyn Garden City, AL7 4QY
- Nature of business
- Electrical installation (SIC 43210)
General cleaning of buildings (SIC 81210) - Year end
- 31 May (accounting reference date)
- Accounts type
- No accounts filed yet
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 Welwyn Garden City
Other active electrical contractors registered in Welwyn Garden City.
- Bowshackle Ltd2014
- CBM Group Ltd2013
- Coughlan Electrical Services Limited2015
- CPJ Electrical Services Ltd2024
- Crown Contracts Limited1986
- D Crashaw Limited2017
- Drewmin Services Limited2019
- Ekelectrics Limited2015
All electrical contractors in Welwyn Garden City · All trades in Welwyn Garden City · Electricians across the UK
Frequently asked questions
When are Blackshire Services Ltd's accounts due?
Blackshire Services Ltd's next accounts are due at Companies House by 6 February 2028 (in 481 days), covering the period to 31 May 2027.
When is Blackshire Services 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 5 May 2027, due by 5 May 2028, and one for the period to 31 May 2027, due by 31 May 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Blackshire Services Ltd still trading?
Blackshire Services 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 Blackshire Services Ltd do?
Blackshire Services Ltd is registered under Electrical installation (SIC 43210); General cleaning of buildings (SIC 81210).
How old is Blackshire Services Ltd?
Blackshire Services Ltd was incorporated on 6 May 2026, less than a year ago.
What is the penalty if Blackshire Services 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 Blackshire Services 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.