GM&MG Ltd
- Company number
- 15347220
- Incorporated
- 12 Dec 20232 years trading
- Registered office
- 21 Otterburn Crescent, Oakhill, Milton Keynes, MK5 6LY
- Nature of business
- Construction of railways and underground railways
GM&MG Ltd is a 2-year-old private limited company registered in Milton Keynes, company number 15347220, one of 86 civil engineering contractors in Milton Keynes. Its next accounts are due at Companies House on 30 September 2027, and the CT600 for the period to 31 December 2026 is due at HMRC on 31 December 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 up £8,217 (+57.2%) on the year before, to £23K.
- Current assets of £30K against £7,555 owed within a year: 4.0 times cover.
- 1 employee on average during the year.
- Balance sheets on record for 2 years, 2024 to 2025.
Net assets by year
| Year end | Net assets | Cash | Current assets | Owed within a year | Employees |
|---|---|---|---|---|---|
| 31 Dec 2025 | £23K | £4,180 | £30K | £7,555 | 1 |
| 31 Dec 2024 | £14K | £24K | £9,453 | 1 |
Where GM&MG Ltd is registered
The registered office is in Milton Keynes (MK5), in the Milton Keynes local authority area, South East. Show MK5 6LY on a map.
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What happens if GM&MG 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 30 September 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Oct 2027 to 31 Oct 2027 | £150 |
| 1 to 3 months late | 1 Nov 2027 to 31 Dec 2027 | £375 |
| 3 to 6 months late | 1 Jan 2028 to 31 Mar 2028 | £750 |
| More than 6 months late | From 1 Apr 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jan 2028 | £200 |
| 3 months late | 31 Mar 2028 | another £200 |
| 6 months late | 30 Jun 2028 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Dec 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
- 15347220
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 12 December 2023 (2 years ago)
- Registered office
- 21 Otterburn Crescent, Oakhill, Milton Keynes, MK5 6LY
- Nature of business
- Construction of railways and underground railways (SIC 42120)
- Year end
- 31 December (accounting reference date)
- Accounts type
- Unaudited abridged
- Last accounts made up to
- 31 December 2025
- Last confirmation statement
- 11 December 2025
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 Milton Keynes
Other active civil engineering contractors registered in Milton Keynes.
- Goodwin's Electrical Ltd2026
- Green Valley Construction Limited2004
- Grewal Road Lines Limited2018
- Henkevi Engineering Services Limited2008
- HG Jointing Limited2026
- Highway Utilities Limited2009
- I G Brickwork Limited2005
- J & M TM Ltd2024
All civil engineering contractors in Milton Keynes · All trades in Milton Keynes · Civil engineering across the UK
Frequently asked questions
When are GM&MG Ltd's accounts due?
GM&MG Ltd's next accounts are due at Companies House by 30 September 2027 (in 352 days), covering the period to 31 December 2026.
When is GM&MG Ltd's CT600 due?
The CT600 for the period to 31 December 2026 is due at HMRC by 31 December 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 October 2027.
Is GM&MG Ltd still trading?
GM&MG 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 GM&MG Ltd do?
GM&MG Ltd is registered under Construction of railways and underground railways (SIC 42120).
How old is GM&MG Ltd?
GM&MG Ltd was incorporated on 12 December 2023, 2 years ago.
What is the penalty if GM&MG 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 GM&MG 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.