- Companies
- Civil engineering
- Reservoir Safety Services Limited
Reservoir Safety Services Limited
- Company number
- 05516312
- Incorporated
- 22 Jul 200521 years trading
- Registered office
- 44 Kingsley Crescent, High Wycombe, HP11 2UL
- Nature of business
- Construction of water projects; Engineering related scientific and technical consulting activities
Reservoir Safety Services Limited is a 21-year-old private limited company, company number 05516312, one of the UK's civil engineering contractors. Its next accounts are due at Companies House on 31 March 2027, and the CT600 for the period to 30 June 2026 is due at HMRC on 30 June 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
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Where Reservoir Safety Services Limited is registered
The registered office is in the HP11 postcode district, in the Buckinghamshire local authority area, South East. Show HP11 2UL on a map.
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What happens if Reservoir Safety Services 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 31 March 2027.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 1 Apr 2027 to 30 Apr 2027 | £150 |
| 1 to 3 months late | 1 May 2027 to 30 Jun 2027 | £375 |
| 3 to 6 months late | 1 Jul 2027 to 30 Sep 2027 | £750 |
| More than 6 months late | From 1 Oct 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 1 Jul 2027 | £200 |
| 3 months late | 30 Sep 2027 | another £200 |
| 6 months late | 30 Dec 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Jun 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
- 05516312
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 22 July 2005 (21 years ago)
- Registered office
- 44 Kingsley Crescent, High Wycombe, HP11 2UL
- Nature of business
- Construction of water projects (SIC 42910)
Engineering related scientific and technical consulting activities (SIC 71122) - Year end
- 30 June (accounting reference date)
- Accounts type
- Total exemption (full)
- Last accounts made up to
- 30 June 2025
- Last confirmation statement
- 29 June 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
Other active civil engineering contractors.
Frequently asked questions
When are Reservoir Safety Services Limited's accounts due?
Reservoir Safety Services Limited's next accounts are due at Companies House by 31 March 2027 (in 169 days), covering the period to 30 June 2026.
When is Reservoir Safety Services Limited's CT600 due?
The CT600 for the period to 30 June 2026 is due at HMRC by 30 June 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 1 April 2027.
Is Reservoir Safety Services Limited still trading?
Reservoir Safety Services 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 Reservoir Safety Services Limited do?
Reservoir Safety Services Limited is registered under Construction of water projects (SIC 42910); Engineering related scientific and technical consulting activities (SIC 71122).
How old is Reservoir Safety Services Limited?
Reservoir Safety Services Limited was incorporated on 22 July 2005, 21 years ago.
What is the penalty if Reservoir Safety Services 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 Reservoir Safety Services 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.