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- Thames Valley Locks Limited
Company profile · Specialist contractors
Thames Valley Locks Limited
Thames Valley Locks Limited is a 19-year-old private limited company registered in Maidenhead, company number 06243999, one of 53 specialist construction companies in Maidenhead. Its next accounts are due at Companies House on 28 February 2027, and the CT600 for the period to 31 May 2026 is due at HMRC on 31 May 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Financial snapshot, 2025
From the balance sheet at 31 May 2025, as filed at Companies House.
Thames Valley Locks Limited over the years
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 £1,379 (+40.9%) on the year before, to £4,751.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £24 against £5,450 owed within a year: 0.0 times cover.
- No employees reported for the latest year (directors are often not counted as employees).
- 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 May 2025 | £4,751 | £24 | £5,450 | 0 | |
| 31 May 2024 | £3,372 | £4,459 | £5,631 | 1 | |
| 31 May 2023 | £107 | £11K | £7,002 | 1 | |
| 31 May 2022 | £137 | £18K | £10K | 1 | |
| 31 May 2021 | £143 | £17K | £7,031 | 1 | |
| 31 May 2020 | £211 | £6,522 | £5,421 | 1 | |
| 31 May 2019 | £1,454 | £4,342 | £2,148 | ||
| 31 May 2018 | £1,330 | £4,852 | £2,987 | ||
| 31 May 2017 | £2,347 | £6,991 | £4,574 | ||
| 31 May 2016 | £835 | £2,506 | £3,045 |
Where Thames Valley Locks Limited is registered
The registered office is in Maidenhead (SL6), in the Windsor and Maidenhead local authority area, South East. Show SL6 2ND on a map.
Other trade companies in SL6
- B&M Cleaning Solutions LtdCleaning companies
- CC Garden Builds LtdBuilders
- Austin Groundwork Surfaces LimitedGroundworks and demolition
- Woodnest Interiors LtdJoiners and carpenters
- Carizmatic Company LimitedMotor traders
- Sakura Electrical LtdElectricians
- Elite Autos & Tyres LtdMotor traders
- Bigfrith End LtdSpecialist contractors
Also registered at this address
5 other companies use the same registered office as Thames Valley Locks Limited.
- Entec Access Systems LimitedSpecialist contractors
- Guardian Fencing (Southern) LimitedLandscapers and gardeners
- Hurley Design & Build LimitedProperty developers
- Millertech LimitedMachinery repair and installation
- Tyrrell Automotive LimitedMotor traders
What happens if Thames Valley Locks 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 28 February 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Mar 2027 to 31 Mar 2027 | £150 |
| 1 to 3 months late | 1 Apr 2027 to 31 May 2027 | £375 |
| 3 to 6 months late | 1 Jun 2027 to 31 Aug 2027 | £750 |
| More than 6 months late | From 1 Sep 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jun 2027 | £200 |
| 3 months late | 31 Aug 2027 | another £200 |
| 6 months late | 30 Nov 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 31 May 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
- 06243999
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 11 May 2007 (19 years ago)
- Registered office
- The Dairy House, Moneyrow Green, Holyport, Maidenhead, Berkshire, SL6 2ND
- Nature of business
- Other specialised construction activities n.e.c. (SIC 43999)
- Year end
- 31 May (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 May 2025
- Last confirmation statement
- 1 May 2026
- Previous names
- Lockfast 24-7 Limited (until 8 Jan 2009)
Filing notes for specialist construction companies
Specialist contractors often work under CIS for main contractors. Retentions held back by the customer still count towards turnover once the work is done.
Similar companies in Maidenhead
Other active specialist construction companies registered in Maidenhead.
- Thamesbridge Construction Limited2005
- TKS Interiors Limited2022
- Zenith Canopy Structures Limited2004
- Adirobert Interiors Ltd2019
- Alpha Lifting Ltd2023
- Anselmi Limited2024
- Anto&Fab Construction Ltd2023
- Apex Design & Construction Limited2001
All specialist construction companies in Maidenhead · All trades in Maidenhead · Specialist contractors across the UK
Frequently asked questions
When are Thames Valley Locks Limited's accounts due?
Thames Valley Locks Limited's next accounts are due at Companies House by 28 February 2027 (in 139 days), covering the period to 31 May 2026.
When is Thames Valley Locks Limited's CT600 due?
The CT600 for the period to 31 May 2026 is due at HMRC by 31 May 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 March 2027.
Is Thames Valley Locks Limited still trading?
Thames Valley Locks 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 Thames Valley Locks Limited do?
Thames Valley Locks Limited is registered under Other specialised construction activities n.e.c. (SIC 43999).
How old is Thames Valley Locks Limited?
Thames Valley Locks Limited was incorporated on 11 May 2007, 19 years ago.
What is the penalty if Thames Valley Locks 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 Thames Valley Locks 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.