- Companies
- Electricians
- Worthing
- Mainline Renewables Limited
Mainline Renewables Limited
- Company number
- 16199954
- Incorporated
- 22 Jan 20251 year trading
- Registered office
- Martlet House E1 Yeoman Gate, Yeoman Way, Worthing, West Sussex, BN13 3QZ
- Nature of business
- Electrical installation
Mainline Renewables Limited is a 1-year-old private limited company registered in Worthing, company number 16199954, one of 125 electrical contractors in Worthing. Its next accounts are due at Companies House on 31 October 2027, and the CT600 for the period to 31 January 2027 is due at HMRC on 31 January 2028.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2026
From the balance sheet at 31 January 2026, as filed at Companies House.
Public contracts won
Mainline Renewables Limited has one public sector contract award on record; the ones with their own published value total £26K (2025). Source: Contracts Finder and Find a Tender award notices. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| West Sussex County Council | Solar PV System reinstallation and commission | £26K | 10 Sep 2025 |
Where Mainline Renewables Limited is registered
The registered office is in Worthing (BN13), in the Worthing local authority area, South East. Show BN13 3QZ on a map.
Other trade companies in BN13
- Loftworks Sussex LtdBuilders
- Sylvia Build LtdBuilders
- Kem Fencing LtdInstallers
- Akn Property Developments LtdProperty developers
- Shift Air-Conditioning and Refrigeration LtdPlumbers and heating engineers
- McKinderscaffolding LimitedScaffolders
- Dags Scaffolding LtdScaffolders
- Honest Harry's LtdMotor traders
Also registered at this address
12 other companies use the same registered office as Mainline Renewables Limited.
- Atelier Petworth LimitedMotor traders
- BJH Roofing Services LimitedRoofers
- Building and Estate Services LimitedFinishing trades
- Doric Industrial Contracts LimitedRoofers
- G A Macdonald Master Thatcher LtdRoofers
- Goring Beach Huts LtdInstallers
- Harbour View Developments (Sussex) LtdProperty developers
- Interface Union Trade LimitedBuilders
- Kleenzone LimitedCleaning companies
- Le Grove Solar LimitedElectricians
- Light Architecture LtdSpecialist contractors
- Oakling UK LimitedProperty developers
What happens if Mainline Renewables 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 October 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Nov 2027 to 30 Nov 2027 | £150 |
| 1 to 3 months late | 1 Dec 2027 to 31 Jan 2028 | £375 |
| 3 to 6 months late | 1 Feb 2028 to 30 Apr 2028 | £750 |
| More than 6 months late | From 1 May 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Feb 2028 | £200 |
| 3 months late | 30 Apr 2028 | another £200 |
| 6 months late | 31 Jul 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Jan 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
- 16199954
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 January 2025 (1 year ago)
- Registered office
- Martlet House E1 Yeoman Gate, Yeoman Way, Worthing, West Sussex, BN13 3QZ
- Nature of business
- Electrical installation (SIC 43210)
- Year end
- 31 January (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 January 2026
- Last confirmation statement
- 21 January 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 Worthing
Other active electrical contractors registered in Worthing.
- Marlowe Electrical Ltd2023
- Millard Installations Electrical Services Ltd2025
- MPS Electrics Limited2018
- N & R Webb Brickwork Limited2007
- New Wave Electrical Contractors Ltd2019
- North Rhodes Electrical Limited2017
- NRG Sussex Ltd2017
- Osiris Group Ltd2024
All electrical contractors in Worthing · All trades in Worthing · Electricians across the UK
Frequently asked questions
When are Mainline Renewables Limited's accounts due?
Mainline Renewables Limited's next accounts are due at Companies House by 31 October 2027 (in 384 days), covering the period to 31 January 2027.
When is Mainline Renewables Limited's CT600 due?
The CT600 for the period to 31 January 2027 is due at HMRC by 31 January 2028, 12 months after the period end. The corporation tax itself is payable earlier, by 1 November 2027.
Is Mainline Renewables Limited still trading?
Mainline Renewables 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 Mainline Renewables Limited do?
Mainline Renewables Limited is registered under Electrical installation (SIC 43210).
How old is Mainline Renewables Limited?
Mainline Renewables Limited was incorporated on 22 January 2025, 1 year ago.
Has Mainline Renewables Limited won public sector contracts?
Yes. Mainline Renewables Limited has one contract award from public bodies on Contracts Finder and Find a Tender (those with their own published value total £26K), most recently from West Sussex County Council.
What is the penalty if Mainline Renewables 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 Mainline Renewables 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.