- Companies
- Civil engineering
- Pontypridd
- Critical Rail Limited
Critical Rail Limited
- Company number
- 08896371
- Incorporated
- 14 Feb 201412 years trading
- Registered office
- 16 Park Prospect, Pontypridd, CF37 2HF
- Nature of business
- Construction of railways and underground railways
Critical Rail Limited is a 12-year-old private limited company registered in Pontypridd, company number 08896371, one of 26 civil engineering contractors in Pontypridd. Its next accounts are due at Companies House on 30 December 2026, and the CT600 for the period to 30 March 2026 is due at HMRC on 30 March 2027.
Key dates
Worked out from the year end and filing history on the Companies House register.
Is this your company?
File the accounts to Companies House and the CT600 to HMRC yourself with A.X.E.L Filing. One set of questions, both filings, £49 flat. No accountant, no subscription.
File for Critical Rail LimitedOr get a reminder before each deadline
Free. We email you 60, 30, 14, 7 and 1 days before the accounts, CT600 and confirmation statement are due. Unsubscribe in one click.
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 £103K (+17.1%) on the year before, to £707K.
- Net assets rose in 4 of 9 year-on-year comparisons on record.
- Current assets of £90K against £126K owed within a year: 0.7 times cover.
- 3 employees on average during the year.
- 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 Mar 2025 | £707K | £90K | £126K | 3 | |
| 31 Mar 2024 | £604K | £526K | £292K | 3 | |
| 31 Mar 2023 | £614K | £43K | £51K | 3 | |
| 31 Mar 2022 | £649K | £32K | £49K | 3 | |
| 31 Mar 2021 | £660K | £33K | £5,424 | 3 | |
| 31 Mar 2020 | £727K | £156K | £44K | 3 | |
| 31 Mar 2019 | £630K | £446K | £195K | ||
| 31 Mar 2018 | £572K | £539K | £105K | ||
| 31 Mar 2017 | £629K | £867K | £352K | ||
| 31 Mar 2016 | £203K | £109K | £364K | £175K |
Where Critical Rail Limited is registered
The registered office is in Pontypridd (CF37), in the Rhondda Cynon Taf local authority area, Wales. Show CF37 2HF on a map.
Other trade companies in CF37
- Hamilton Motor Group LtdMotor traders
- Pencoed Building Services LtdSpecialist contractors
- Pyo Property Developments LimitedBuilders
- Great Choice Leisure Vehicles LimitedMotor traders
- C2 Interior Contractors LtdBuilders
- Carpet Mine LtdFinishing trades
- LCH4RP LtdProperty developers
- LCH4Est LtdProperty developers
What happens if Critical Rail 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 30 December 2026.
| Companies House | Accounts delivered | Penalty |
|---|---|---|
| Up to 1 month late | 31 Dec 2026 to 30 Jan 2027 | £150 |
| 1 to 3 months late | 31 Jan 2027 to 30 Mar 2027 | £375 |
| 3 to 6 months late | 31 Mar 2027 to 30 Jun 2027 | £750 |
| More than 6 months late | From 1 Jul 2027 | £1,500 |
Penalties double if the accounts were also late the year before.
| HMRC (CT600) | From | Penalty |
|---|---|---|
| 1 day late | 31 Mar 2027 | £200 |
| 3 months late | 30 Jun 2027 | another £200 |
| 6 months late | 30 Sep 2027 | HMRC estimates the tax and adds 10% of the unpaid tax |
| 12 months late | 30 Mar 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
- 08896371
- Status
- Active
- Company type
- Private limited company
- Incorporated
- 14 February 2014 (12 years ago)
- Registered office
- 16 Park Prospect, Pontypridd, CF37 2HF
- Nature of business
- Construction of railways and underground railways (SIC 42120)
- Year end
- 30 March (accounting reference date)
- Accounts type
- Micro-entity
- Last accounts made up to
- 31 March 2025
- Last confirmation statement
- 20 May 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 in Pontypridd
Other active civil engineering contractors registered in Pontypridd.
- Dee Plant Limited2004
- Emtage Rail Ltd2023
- Faith Rail Limited2020
- Flowline Civil Engineering Ltd1995
- Gareth Lawrence Rail Ltd2017
- HGC Civil Engineering South Wales Ltd2026
- Intrado Ltd2006
- Isource Rail Engineering Ltd2019
All civil engineering contractors in Pontypridd · All trades in Pontypridd · Civil engineering across the UK
Frequently asked questions
When are Critical Rail Limited's accounts due?
Critical Rail Limited's next accounts are due at Companies House by 30 December 2026 (in 78 days), covering the period to 30 March 2026.
When is Critical Rail Limited's CT600 due?
The CT600 for the period to 30 March 2026 is due at HMRC by 30 March 2027, 12 months after the period end. The corporation tax itself is payable earlier, by 31 December 2026.
Is Critical Rail Limited still trading?
Critical Rail 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 Critical Rail Limited do?
Critical Rail Limited is registered under Construction of railways and underground railways (SIC 42120).
How old is Critical Rail Limited?
Critical Rail Limited was incorporated on 14 February 2014, 12 years ago.
What is the penalty if Critical Rail 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 Critical Rail 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.