- Companies
- Installers
- London
- Medlock Ltd
Medlock Ltd
- Company number
- 17405798
- Incorporated
- 18 Aug 2026
- Registered office
- 167-169 5TH Floor, Great Portland Street, London, W1W 5PF
- Nature of business
- Other construction installation
Medlock Ltd is a newly incorporated private limited company registered in London, company number 17405798, one of 2,278 installation companies (insulation, lifts, shutters and similar) in London. Its next accounts are due at Companies House on 18 May 2028, and its first CT600 is due at HMRC on 17 August 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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Public contracts won
Medlock Ltd has one public sector contract award on record (2022). Source: Contracts Finder and Find a Tender award notices. For all of them the published figure is a shared or multi-year ceiling (a framework place, a multi-supplier award, or more than a small company could hold alone), so no value is shown. These were matched by the company's exact name because the notice gave no company number.
| Buyer | Contract | Value | Awarded |
|---|---|---|---|
| London Borough of Hackney | Housing Repairs DLO - Materials Supply | Ceiling, not shown | 7 Nov 2022 |
Where Medlock Ltd is registered
The registered office is in London (W1W), in the Westminster local authority area, London. Show W1W 5PF on a map.
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Also registered at this address
13 other companies use the same registered office as Medlock Ltd.
- 360 Trauma Clean LtdCleaning companies
- Advanced LtdSpecialist contractors
- Alphaville Projects LimitedProperty developers
- Building General Services LtdProperty developers
- D-Driver 84 LtdPainters and decorators
- Digital Quadrant LimitedElectricians
- Divine Whyte LtdCleaning companies
- Effective Solution Group LtdFinishing trades
- Focus Factory LtdSpecialist contractors
- G&C Commercial Services LtdCleaning companies
- Kinto Premium Aftercare LtdCleaning companies
- Scratchfix Auto Body Repairs LtdMechanics and garages
- Zaben LtdProperty developers
What happens if Medlock 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 18 May 2028.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 19 May 2028 to 18 Jun 2028 | £150 |
| 1 to 3 months late | 19 Jun 2028 to 18 Aug 2028 | £375 |
| 3 to 6 months late | 19 Aug 2028 to 18 Nov 2028 | £750 |
| More than 6 months late | From 19 Nov 2028 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Sep 2028 | £200 |
| 3 months late | 30 Nov 2028 | another £200 |
| 6 months late | 28 Feb 2029 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 Aug 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
- 17405798
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 18 August 2026
- Registered office
- 167-169 5TH Floor, Great Portland Street, London, W1W 5PF
- Nature of business
- Other construction installation (SIC 43290)
- Year end
- 31 August (accounting reference date)
- Accounts type
- No accounts filed yet
Filing notes for installation companies (insulation, lifts, shutters and similar)
Installation companies (insulation, lifts, shutters, solar and similar) often buy stock and equipment up front, so stock at the year end and capital allowances both affect the tax bill.
Similar companies in London
Other active installation companies (insulation, lifts, shutters and similar) registered in London.
- Mefisto Welding Services Ltd2026
- Melmart Construction Limited2026
- Mend and Build Limited2024
- Mendra Services Ltd2026
- Meridian Heights Ltd2024
- Meridians Services Ltd2026
- Mestory Construction Ltd2024
- Metallico Ltd2010
All installation companies (insulation, lifts, shutters and similar) in London · All trades in London · Installers across the UK
Frequently asked questions
When are Medlock Ltd's accounts due?
Medlock Ltd's next accounts are due at Companies House by 18 May 2028 (in 584 days), covering the period to 31 August 2027.
When is Medlock 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 17 August 2027, due by 17 August 2028, and one for the period to 31 August 2027, due by 31 August 2028. Corporation tax is payable 9 months and 1 day after the end of each.
Is Medlock Ltd still trading?
Medlock 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 Medlock Ltd do?
Medlock Ltd is registered under Other construction installation (SIC 43290).
How old is Medlock Ltd?
Medlock Ltd was incorporated on 18 August 2026, less than a year ago.
Has Medlock Ltd won public sector contracts?
Yes. Medlock Ltd has one contract award from public bodies on Contracts Finder and Find a Tender, most recently from London Borough of Hackney.
What is the penalty if Medlock 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 Medlock 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.