Network Rail Certification Body Limited
Registered name: NETWORK RAIL CERTIFICATION BODY LIMITED
Part of Secretary Of State For Transport groupNetwork Rail Certification Body Limited made £6.1m revenue and £10k profit in the year to 31 Mar 2025.
Network Rail Certification Body Limited’s revenue grew 4% to £6.1m in the year to 31 Mar 2025, with £10k profit. The company is classified under “other business support service activities” and is based in London; we hold 3 years of its filed accounts.
- Status
- Active
- Location
- London
- Age
- 14 yrs · since 2011
- Type
- Private Limited Company
Key figures
Financial history
| Year to | 31 Mar 2023 | 31 Mar 2024 | 31 Mar 2025 |
|---|---|---|---|
| Disclosure | Full P&L | Full P&L | Full P&L |
| Profit & loss | |||
| Revenue (turnover) | £5.3m | £5.9m | £6.1m |
| Cost of sales | −£5.3m | −£5.8m | −£6.1m |
| Operating profit | £82k | £13k | −£9k |
| Profit before tax | £107k | £31k | £7k |
| Profit after tax | £114k | £28k | £10k |
| Profit (best available) | £114k | £28k | £10k |
| Employees (average) | — | — | — |
| Ratios | |||
| Profit margin | 2.1% | 0.5% | 0.2% |
| Growth (year on year) | |||
| Revenue growth | — | ▲9.8% | ▲4.5% |
| Profit growth | — | ▼75.4% | ▼64.3% |
| Balance sheet — indirect signals, not revenue | |||
| Net assets | — | — | — |
| Source | Accounts · bulk data Nov 2024 | Accounts · bulk data Nov 2024 | Accounts · bulk data Dec 2025 |
How the business works
- Profit margin
- 0.2%
- Profit ÷ revenue.
- Gross margin
- —
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- —
- Revenue ÷ average employees.
- Profit per employee
- —
- Profit ÷ average employees.
- Cash conversion
- —
- Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
- Fixed assets ÷ revenue
- —
- Capital intensity. Low = capital-light, cheaper to start.
- Deferred income ÷ revenue
- —
- Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
- Debtors ÷ revenue
- —
- Money owed by customers. Low = customers pay quickly.
Balance-sheet signals
Year-on-year changes in filed balance-sheet items. They can hint at momentum (or investment) but are not revenue or profit and must not be read as such.
- Net assets
- —
- Now —
- Cash at bank
- —
- Now —
- Headcount
- —
- Now —
- Deferred income
- —
- Now —
- Fixed assets
- —
- Now —
Group structure
Ownership chain
- Secretary Of State For Transport (registered outside the UK register)ultimate parent75–100%
- Network Rail Limited75–100%
- Network Rail Holdco Limited75–100%
- Network Rail Infrastructure Limited75–100%
- Network Rail Certification Body Limitedthis company
Bands show the share of ownership each company holds in the one below it.
Sister companies (16)
- Network Rail International LimitedRev. £34.5m · Profit −£1m
- Platform4 Rail Regeneration LimitedRev. £27.5m · Profit −£9.7m
- Great British Railways Consulting LimitedFigures not disclosed
- Kew Bridge Manco LimitedFigures not disclosed
- Network Rail (High Speed) LimitedFigures not disclosed
- Network Rail (Spacia) LimitedFigures not disclosed
- Network Rail (Stations) LimitedFigures not disclosed
- Network Rail (VY1) LimitedFigures not disclosed
- Network Rail (VY2) LimitedFigures not disclosed
- Network Rail Development LimitedFigures not disclosed
- Network Rail Pension Trustee LimitedFigures not disclosed
- Network Rail Property LimitedFigures not disclosed
- NR Corporate Secretary LimitedFigures not disclosed
- Railway Property LimitedFigures not disclosed
- Spacia (2002) LimitedFigures not disclosed
- Victoria Place Shopping Centre LimitedFigures not disclosed
From the Persons with Significant Control register (corporate controllers only).
Sources
Latest figures from accounts for the year to 31 Mar 2025 (profit £10k), from the Companies House accounts bulk data published Dec 2025. Spotted an error? Request a correction.
Updated from Companies House on 21 Oct 2026
Contains public sector information from Companies House licensed under the Open Government Licence v3.0. Data from Companies House, © Crown copyright. View the licence.