£31k
−21%vs Sept 2024Active03845305Private limited companyLeatherhead
RESERVOIR DYNAMICS LIMITED
Significant control: Sarah Emily Kelly (25–50%), Gregory James Heffer (25–50%) and 2 more
From public filings as at 31 Aug 2026; may contain errors or be out of date. Verify at Companies House · Terms
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Registered activity: Other research and experimental development on natural sciences and engineering (SIC 72190). We’re building product and service lists for UK companies. Get this one when it’s ready.
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01
Summary
RESERVOIR DYNAMICS LIMITED is an active private limited company (company number 03845305) incorporated on 21 September 1999, registered in Leatherhead. Its registered activity is other research and experimental development on natural sciences and engineering (SIC 72190). Latest micro accounts cover the period ending 30 September 2025, showing net assets of £31k, with 2 employees on average. As micro-entity accounts, no profit and loss account is filed, so turnover and profit are not public. Net assets fell 21% on the prior period (£39k).
Peer position · net assets
By net assets it sits in the upper half of 210 comparable companies in Greater London (median £1,000, upper quartile £52k).
02
Ownership and control
- Mrs Sarah Emily Kelly
- owns 25–50% of shares
- holds 25–50% of voting rights
- Mr Gregory James Heffer
- owns 25–50% of shares
- holds 25–50% of voting rights
- Mrs Linda Anne Heffer
- has significant influence or control
- Mr Kerrell John Heffer
- has significant influence or control
Persons with significant control hold 25% or more of shares or voting rights. Smaller shareholdings are only listed in confirmation-statement documents. Directors and secretaries: see the officers list at Companies House.
03
Key dates
- Incorporated
- 21 September 199927 yrs ago
- Next accounts due
- 30 June 2027in 245 days
- Confirmation statement due
- 5 October 2027in 342 days
Due dates are expected from Companies House filing rules; confirm on the official register before relying on them.
04
Activity
- SIC 72190
- Other research and experimental development on natural sciences and engineering
- Accounts type
- Micro Entity
- Size band
- MicroCompanies Act thresholds
05
Financials
Not reported
Not disclosed
2
No changevs Sept 2024| Period end | Net assets | Cash | Debtors | Creditors <1y | Turnover | Profit | Employees |
|---|---|---|---|---|---|---|---|
| 30 September 2025 | £31k | — | — | — | — | — | 2 |
| 30 September 2024 | £39k | — | — | — | — | — | 2 |
Figures as filed in iXBRL accounts at Companies House. "—" means the line was not reported in that filing; micro-entity accounts contain no profit and loss account.
06
Filing and accounts signals
- Net assets above zeroNet assets £31,068 at 30 September 2025
- Incorporated five or more years agoIncorporated 21 September 1999
Neutral facts read from the register and filed accounts, each with its evidence. They are not a rating, a prediction or advice, and may be incomplete or out of date. How each signal is derived.
07
Timeline
- Confirmation statement duein 342 days
- Next accounts duein 245 days
- Accounts period endNet assets £31k · micro accounts
- Accounts period endNet assets £39k · micro accounts
- Incorporated
08
Similar companies in Greater London
- KELTIK LIMITEDMiddlesex · inc. Jun 1999
- SPIIRAS LIMITEDDagenham · inc. May 1999
- ENGINEERING SCIENCES LIMITEDMiddlesex · inc. Mar 1999
- W.W. WIDGETS.CO LIMITEDBarnet · inc. Mar 1999
- OPTIMAL SOLUTIONS 4U LIMITEDMiddlesex · inc. Nov 2000
- MILLIPORE (U.K.) LIMITEDFeltham · inc. Dec 2000
All companies incorporated on 21 September 1999 · in Sept 1999.
09
Reminders for RESERVOIR DYNAMICS LIMITED
Get an email before each filing deadline — accounts and confirmation statement — so nothing is late.