- Companies
- Mechanics and garages
- London
- Diamond Alloys Limited
Diamond Alloys Limited
- Company number
- 17487900
- Incorporated
- 29 Sep 2026
- Registered office
- 4 Quex Road, London, NW6 4PJ
- Nature of business
- Maintenance and repair of motor vehicles
Diamond Alloys Limited is a newly incorporated private limited company registered in London, company number 17487900, one of 2,410 vehicle repair garages in London. Its next accounts are due at Companies House on 29 June 2028, and its first CT600 is due at HMRC on 28 September 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 Diamond Alloys Limited is registered
The registered office is in London (NW6), in the Camden local authority area, London. Show NW6 4PJ on a map.
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- Velmont Construction LtdInstallers
- Prime Build Roofing LimitedRoofers
- Mannyservices LtdFloor and wall tilers
- Pureguard London LtdCleaning companies
- Ace Body Work LimitedMechanics and garages
- Jimpex LtdProperty developers
Also registered at this address
12 other companies use the same registered office as Diamond Alloys Limited.
- Aa Carpets Cleaners LimitedCleaning companies
- Anahita D. D. LimitedBuilders
- Medical Team LimitedProperty developers
- N & K Engineering and Technical Solutions LtdBuilders
- Nava & Co LtdProperty developers
- Orient Gate Trading LtdBuilders
- Portman Properties LimitedProperty developers
- Pounder LtdProperty developers
- Silver Valley Enterprise LimitedProperty developers
- Souza Partners LtdProperty developers
- Speedy Motors LtdMotor traders
- Swanwell Property LtdProperty developers
What happens if Diamond Alloys 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 June 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 30 Jun 2028 to 29 Jul 2028 | £150 |
| 1 to 3 months late | 30 Jul 2028 to 29 Sep 2028 | £375 |
| 3 to 6 months late | 30 Sep 2028 to 29 Dec 2028 | £750 |
| More than 6 months late | From 30 Dec 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Oct 2028 | £200 |
| 3 months late | 30 Dec 2028 | another £200 |
| 6 months late | 30 Mar 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Sep 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
- 17487900
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 29 September 2026
- Registered office
- 4 Quex Road, London, NW6 4PJ
- Nature of business
- Maintenance and repair of motor vehicles (SIC 45200)
- Year end
- 30 September (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for vehicle repair garages
Garages hold parts stock and often own diagnostic equipment and ramps, which qualify for capital allowances.
Similar companies in London
Other active vehicle repair garages registered in London.
- Diamond Auto Spa Ltd2026
- Diamond Vehicles Limited2014
- Dicraft Limited2014
- Dimond Motors Ltd2023
- Dinocars Ltd2011
- Dipstick's Tyres & Exhausts Limited2002
- Direct Diagnostics Ltd.2020
- Direct Motorsport Ltd2026
All vehicle repair garages in London · All trades in London · Mechanics and garages across the UK
Frequently asked questions
When are Diamond Alloys Limited's accounts due?
Diamond Alloys Limited's next accounts are due at Companies House by 29 June 2028 (in 625 days), covering the period to 30 September 2027.
When is Diamond Alloys Limited's CT600 due?
The first accounts cover more than 12 months, so there are two Company Tax Returns: one for the 12 months to 28 September 2027, due by 28 September 2028, and one for the period to 30 September 2027, due by 30 September 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Diamond Alloys Limited still trading?
Diamond Alloys 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 Diamond Alloys Limited do?
Diamond Alloys Limited is registered under Maintenance and repair of motor vehicles (SIC 45200).
How old is Diamond Alloys Limited?
Diamond Alloys Limited was incorporated on 29 September 2026, less than a year ago.
What is the penalty if Diamond Alloys 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 Diamond Alloys 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.