- Companies
- Civil engineering
- Prestwick
- Mainlines (Scotland) Limited
Mainlines (Scotland) Limited
- Company number
- SC199475
- Incorporated
- 2 Sep 199927 years trading
- Registered office
- Westburn Business Centre, McNee Road, Prestwick, Ayrshire, KA9 2PB
- Nature of business
- Construction of other civil engineering projects n.e.c.
Mainlines (Scotland) Limited is a 27-year-old private limited company registered in Prestwick, company number SC199475, one of the UK's civil engineering contractors. Its next accounts are due at Companies House on 29 May 2027, and the CT600 for the period to 29 August 2026 is due at HMRC on 29 August 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 £3,523 (-4.3%) on the year before, to £78K.
- Net assets rose in 2 of 9 year-on-year comparisons on record.
- Current assets of £12K against £72K owed within a year: 0.2 times cover.
- 2 employees on average during the year.
- Balance sheets on record for 10 years, 2016 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Aug 2025 | £78K | £4,905 | £12K | £72K | 2 |
| 31 Aug 2024 | £82K | £2,837 | £8,121 | £66K | 2 |
| 31 Aug 2023 | £126K | £55K | £87K | £30K | 2 |
| 31 Aug 2022 | £153K | £75K | £106K | £26K | 2 |
| 31 Aug 2021 | £182K | £92K | £127K | £24K | 2 |
| 31 Aug 2020 | £208K | £93K | £134K | £10K | 2 |
| 31 Aug 2019 | £243K | £154K | £220K | £16K | 4 |
| 31 Aug 2018 | £418K | £361K | £444K | £71K | 4 |
| 31 Aug 2017 | £369K | £327K | £456K | £139K | 4 |
| 31 Aug 2016 | £324K | £229K | £349K | £62K | 5 |
Who runs and owns Mainlines (Scotland) Limited
From the Companies House register. Individuals are shown by initials only; the full register is on Companies House.
Officers (3)
| Name | Role | Appointed |
|---|---|---|
| J*** M*** | Director | Sep 1999 |
| K*** M*** | Director | Jun 2002 |
| K*** M*** | Secretary | Apr 2003 |
4 former officers
| Name | Role | Appointed | Left |
|---|---|---|---|
| J*** T*** | Secretary | Sep 1999 | Apr 2003 |
| Brian Reid Ltd. | Corporate Nominee Secretary | Sep 1999 | Sep 1999 |
| J*** M*** | Director | Sep 1999 | Jun 2002 |
| Stephen Mabbott Ltd. | Nominee director (company) | Sep 1999 | Sep 1999 |
Person with significant control
Where Mainlines (Scotland) Limited is registered
The registered office is in Prestwick (KA9), in the South Ayrshire local authority area, Scotland. Show KA9 2PB on a map.
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Also registered at this address
3 other companies use the same registered office as Mainlines (Scotland) Limited.
- Finnis Property Ltd.Property developers
- Martin and White LimitedJoiners and carpenters
- Tyme LimitedProperty developers
What happens if Mainlines (Scotland) 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 29 May 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 30 May 2027 to 29 Jun 2027 | £150 |
| 1 to 3 months late | 30 Jun 2027 to 29 Aug 2027 | £375 |
| 3 to 6 months late | 30 Aug 2027 to 29 Nov 2027 | £750 |
| More than 6 months late | From 30 Nov 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 30 Aug 2027 | £200 |
| 3 months late | 29 Nov 2027 | another £200 |
| 6 months late | 29 Feb 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 29 Aug 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
- SC199475
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 2 September 1999 (27 years ago)
- Registered office
- Westburn Business Centre, McNee Road, Prestwick, Ayrshire, KA9 2PB
- Nature of business
- Construction of other civil engineering projects n.e.c. (SIC 42990)
- Year end
- 29 August (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 31 August 2025
- Last confirmation statement
- 2 September 2026
Filing notes for civil engineering contractors
Civil engineering contractors usually carry plant and machinery, so capital allowances (the annual investment allowance and the main pool) do much of the work in the corporation tax computation.
Similar companies in Prestwick
Other active civil engineering contractors registered in Prestwick.
All civil engineering contractors in Prestwick · All trades in Prestwick · Civil engineering across the UK
Frequently asked questions
When are Mainlines (Scotland) Limited's accounts due?
Mainlines (Scotland) Limited's next accounts are due at Companies House by 29 May 2027 (in 228 days), covering the period to 29 August 2026.
When is Mainlines (Scotland) Limited's CT600 due?
The CT600 for the period to 29 August 2026 is due at HMRC by 29 August 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 30 May 2027.
Is Mainlines (Scotland) Limited still trading?
Mainlines (Scotland) 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 Mainlines (Scotland) Limited do?
Mainlines (Scotland) Limited is registered under Construction of other civil engineering projects n.e.c. (SIC 42990).
How old is Mainlines (Scotland) Limited?
Mainlines (Scotland) Limited was incorporated on 2 September 1999, 27 years ago.
Who runs Mainlines (Scotland) Limited?
Mainlines (Scotland) Limited has 2 active directors, the longest-serving appointed in Sep 1999. Their names and service addresses are on the Companies House register.
Who owns Mainlines (Scotland) Limited?
One person or company has significant control of Mainlines (Scotland) Limited: an individual (owns 50% to 75% of the shares).
What is the penalty if Mainlines (Scotland) 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 Mainlines (Scotland) 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.