T. G. Tunnelling Limited
Registered name: T. G. TUNNELLING LIMITED
Part of T G Tunnelling (Holdings) Limited groupT. G. Tunnelling Limited made £104m revenue and £356k profit in the year to 31 Oct 2025. read from filing text
T. G. Tunnelling Limited’s revenue fell 2% to £104m in the year to 31 Oct 2025, with £356k profit and 646 employees. The company is classified under “construction of bridges and tunnels” and is based in London; we hold 5 years of its filed accounts.
- Status
- Active
- Location
- London, London
- Age
- 30 yrs · since 1995
- Type
- Private Limited Company
Part of a group. The filing indicates this company sits within a group structure, so its results may depend on intra-group trading and it may be hard to replicate independently. From the filing: “The company is a subsidiary of T”
Key figures
Badges are automated estimates derived from the filed figures — not statements of fact about the company.
Financial history
| Year to | 31 Oct 2021 | 31 Oct 2022 | 31 Oct 2023 | 31 Oct 2024 | 31 Oct 2025 |
|---|---|---|---|---|---|
| Disclosure | Full P&Lread from filing text | Full P&Lread from filing text | Full P&Lread from filing text | Full P&Lread from filing text | Full P&Lread from filing text |
| Profit & loss | |||||
| Revenue (turnover) | £50.6m | £83.6m | £89.7m | £106m | £104m |
| Cost of sales | £46.5m | £78m | £84.2m | £102m | £102m |
| Gross profit | £4.1m | £5.5m | £5.5m | £4.2m | £2.4m |
| Operating profit | £3.3m | £4.4m | £4.8m | £2.2m | £45.7k |
| Profit before tax | £3.3m | £4.4m | £4.9m | £2.3m | £124k |
| Profit after tax | £3.8m | £3.6m | £3.8m | £1.2m | £356k |
| Profit (best available) | £3.8m | £3.6m | £3.8m | £1.2m | £356k |
| Staff costs | £45.8m | £76.9m | £81.8m | £95.3m | £92m |
| Employees (average) | 464 | 464 | 488 | 746 | 646 |
| Ratios | |||||
| Profit margin | 7.5% | 4.3% | 4.3% | 1.2% | 0.3% |
| Gross margin | 8% | 6.6% | 6.2% | 3.9% | 2.3% |
| Revenue per employee | £109k | £180k | £184k | £143k | £161k |
| Profit per employee | £8.1k | £7.7k | £7.8k | £1.7k | £550 |
| Growth (year on year) | |||||
| Revenue growth | — | ▲65.2% | ▲7.4% | ▲18.7% | ▼2.1% |
| Profit growth | — | ▼4.9% | ▲6.2% | ▼67.3% | ▼71.5% |
| Headcount growth | — | 0% | ▲5.2% | ▲52.9% | ▼13.4% |
| Balance sheet — indirect signals, not revenue | |||||
| Cash at bank | £4.2m | £7.9m | £5.3m | £1.2m | £7.7m |
| Net assets | £15.6m | £18.4m | £20.9m | £21.8m | £19.7m |
| Fixed assets | £1.1m | £1m | £205k | £140k | £5.7k |
| Current assets | £22.1m | £28.9m | £30.8m | £32.4m | £32.3m |
| Debtors | £10.1m | £3.4m | £6.5m | £4.6m | £2.9m |
| Deferred income | £754k | £1.2m | £462k | £598k | £1.4m |
| Source | Accounts · bulk data Oct 2023 | Accounts · bulk data Oct 2023 | FullAccounts · bulk data Jul 2024 | FullAccounts · bulk data Oct 2025 | FullAccounts · bulk data Jul 2026 |
How the business works
- Profit margin
- 0.3%
- Profit ÷ revenue.
- Gross margin
- 2.3%
- Gross profit ÷ revenue. High for software and services.
- Revenue per employee
- £161k
- Revenue ÷ average employees.
- Profit per employee
- £550
- Profit ÷ average employees.
- Cash conversion
- —
- Cash generated from operations ÷ operating profit. Needs a cash-flow statement.
- Fixed assets ÷ revenue
- 0%
- Capital intensity. Low = capital-light, cheaper to start.
- Deferred income ÷ revenue
- 1.3%
- Customers paying upfront (subscriptions, deposits). Approximate when combined with accruals.
- Debtors ÷ revenue
- 2.8%
- 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
- ▼10%
- Now £19.7m
- Cash at bank
- ▲541%
- Now £7.7m
- Headcount
- ▼13%
- Now 646
- Deferred income
- ▲127%
- Now £1.4m
- Fixed assets
- ▼96%
- Now £5.7k
Deferred income is reported together with accruals in this filing (“accruals and deferred income”), so it is an approximate signal only.
Group structure
Ownership chain
- T G Tunnelling (Holdings) Limitedultimate parent75–100%
- T. G. Tunnelling Limitedthis company
Bands show the share of ownership each company holds in the one below it.
Sister companies (1)
- Carnvalley Investments LimitedFigures not disclosed
From the Persons with Significant Control register (corporate controllers only).
Similar profitable businesses
Sources
Latest figures from FullAccounts for the year to 31 Oct 2025 (profit £356k), from the Companies House accounts bulk data published Jul 2026. Spotted an error? Request a correction.
Contains public sector information from Companies House licensed under the Open Government Licence v3.0. Data from Companies House, © Crown copyright. View the licence.