# TUNNEL VENTILATION SYSTEMS LTD (07018731)

> TUNNEL VENTILATION SYSTEMS LTD is an active private limited company (company number 07018731) incorporated on 15 September 2009, registered in Surrey. Its registered activity is other specialised construction activities n.e.c. (SIC 43999). Latest small accounts cover the period ending 31 March 2025, showing net assets of £1.34m and cash of £908k, with 2 employees on average. Net assets rose 13% on the prior period (£1.18m).

- Status: Active
- Incorporated: 2009-09-15
- Registered office: Surrey, GU6 7GJ
- SIC 43999: Other specialised construction activities n.e.c.
- Next accounts due: 2026-12-31
- Confirmation statement due: 2027-09-29
- Accounts type: TOTAL EXEMPTION FULL

By net assets it sits in the top quarter of 715 comparable companies in Surrey (median £9,891, upper quartile £86k).

## Accounts (as filed)

| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 2025-03-31 | £1.34m | £908k | £704k | £285k | — | — | 2 |
| 2024-03-31 | £1.18m | £1.00m | £354k | £187k | — | — | 2 |

current ratio 5.65; size band micro.

## Filing and accounts signals (facts, not a rating)

- Net assets above zero: Net assets £1,339,246 at 31 March 2025
- Net assets up 10% or more on the prior period: +13.3% vs prior period
- Current assets at least 1.5× creditors within one year: Current ratio 5.65
- Cash at bank of £50,000 or more: Cash £907,545
- Incorporated five or more years ago: Incorporated 15 September 2009

How each signal is derived: https://firmoscan.com/methodology

## Persons with significant control

- Mr Martin Stuart Smith — owns 25–50% of shares; holds 25–50% of voting rights, since 2016-09-15
- Mrs Lindsey Clare Smith — owns 25–50% of shares; holds 25–50% of voting rights, since 2016-09-15

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Source: Companies House register snapshot 2026-08-31, Open Government Licence v3.0. Information may have changed since that date and is not advice or a credit reference; check the official record before relying on it. Official record: https://find-and-update.company-information.service.gov.uk/company/07018731
HTML: https://firmoscan.com/company/07018731-tunnel-ventilation-systems-ltd