Serpentine Lake Capital LLP

Reference number: 954060

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Appointed representative

This firm does not hold FCA authorisation of its own, and acts under a principal firm, which is legally responsible for its regulated business.

Responsible principal firm

Thornbridge Investment Management LLP Reference number: 713859 Authorised View firm →
What does this mean?
  • An appointed representative (AR) can carry out regulated financial services, but is not directly authorised by the FCA. A principal firm holds the authorisation and is legally responsible for the AR's conduct.
  • Serpentine Lake Capital LLP (FRN 954060) is an AR of Thornbridge Investment Management LLP (FRN 713859). When you use Serpentine Lake Capital's services, the FCA authorisation sits with the principal firm.
  • Example: if you take financial advice from Serpentine Lake Capital, complaints and compensation usually follow the same rules as dealing with the principal, but this depends on the product and your circumstances.
  • Before you proceed, confirm contact details match the official FCA register for both firms. Scammers sometimes clone legitimate AR names and FRNs but use fake phone numbers and websites.

Website, phone number and address

Compare these against whatever you were given. Scammers clone real firm names and reference numbers but use their own phone number and website, so a detail that does not match the register is the clearest warning sign there is.

  • No website on the FCA register

  • Phone number

    07738 496172

  • Address

    No 1 Royal Exchange, London, EC3V 3DG, United Kingdom

In the full report: 2 background checks

  • What kind of line 07738 496172 is
  • Who else gives the postcode EC3V 3DG
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Other names (3)

If you were contacted under any of these names, it is this firm.

  • HydrogenOne Capital LLP Former name
  • HydrogenOne Former trading name
  • HydrogenOne Capital Former trading name

FCA permissions and consumer protection

  • Protection through the principal firm
    Protection works through Thornbridge Investment Management LLP, the principal firm responsible for this firm's regulated activity. FSCS cover and the Financial Ombudsman Service apply as they would to the principal.
  • Complaints Ombudsman, free
    You can refer a complaint about this firm to the Financial Ombudsman Service for free, whichever activity it relates to.

FCA disciplinary action and complaints

No FCA disciplinary action.

The Financial Ombudsman Service only publishes complaint figures for firms with 30 or more new complaints in six months, so there are none here for this firm.

Companies House record

The company behind the firm: its status, age, registered office and directors.

Company number
OC434235
Company status
Active
Company type
Limited liability partnership
Incorporated
15 November 2020 (5 years old)
Registered office
No1 Royal Exchange, London, EC3V 3DG, England

Directors and company secretaries

Name Role Born Appointed Other companies
Richard John Hulf LLP designated member Aug 1966 15 Nov 2020 6 other companies
John Joseph Traynor LLP designated member Oct 1964 15 Nov 2020 14 other companies

Other companies run by these 2 directors

A firm is run by people, and their other companies are their track record: what they built, what closed, and anything that failed. It is the check most people never think to make.

other companies
19
closed down
4
went insolvent
1

In the full report: all 19 companies, named

  • What each company does, and whether it is still trading
  • Which of these 2 directors sit on each board, and since when
  • The one that went into liquidation or administration
  • The 1 company these 2 directors run together
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Filed accounts and finances

Year to 31 March 2025Small company accountsNot audited

Net assets

£316k

+98% from £160k

Cash at bank

£323k

+120% from £146k

Employees (average)

4

Same as 4

Assets and liabilities

About these figures
Turnover
Money taken from sales in the year, before any costs.
Profit before tax
What was left after the year’s costs, before corporation tax. A minus figure is a loss.
Net assets, or total equity
Everything the company owns minus everything it owes. A minus figure means it owes more than it owns.
Total assets and total liabilities
Everything the company owns, and everything it owes, on the last day of the year. The gap between them is its net assets.
Cash at bank
Money in the company’s accounts on the last day of the year.
Owed within a year, owed after a year
Debts and bills due in the next twelve months, and those due later.

There is no turnover or profit: small companies do not have to publish them.

Accounts filed at Companies House for company OC434235. Every figure is as filed, apart from total assets and total liabilities, which are added up from filed figures. Nothing is estimated.

Key dates in its history

Serpentine Lake Capital’s history from the FCA register and Companies House, newest first.

Key events (5) All events (11)

2025

9 October 2025

  • Changed its registered name from "HydrogenOne Capital LLP"

FCA register

2021

2 July 2021

  • Became an appointed representative

FCA register

2020

15 November 2020

  • Incorporated at Companies House
  • Dt John Joseph Traynor became a part-owner (25–50% of shares)
  • Richard John Hulf became a part-owner (25–50% of shares)

Companies House

In the full report: all 11 events

  • All 11 events in its history (5 shown here)
  • Every director appointment and resignation: 2
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Firms like Serpentine Lake Capital

Other firms of the same type (investment or fund manager), nearest first.

In London

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Firms are listed by type and location, best known first. Being listed is not a recommendation: check any firm before you deal with it.

Get the full report on Serpentine Lake Capital

Everything on this page, plus everything locked above, in one dated PDF you can keep, file or send on.

  • 19 other companies its directors have run, named
  • 2 background checks on its contact details
  • All 11 events in its history

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Frequently asked questions about this firm

Is Serpentine Lake Capital LLP FCA authorised?
Serpentine Lake Capital LLP (FRN 954060) is not directly authorised. It is an appointed representative acting under the responsibility of a directly authorised principal firm.
What does appointed representative mean for Serpentine Lake Capital?
An appointed representative (AR) can carry out regulated financial services, but is not directly authorised by the FCA. A principal firm holds the authorisation and is legally responsible for the AR's conduct. Serpentine Lake Capital LLP (FRN 954060) is an AR of Thornbridge Investment Management LLP (FRN 713859). When you use Serpentine Lake Capital's services, the FCA authorisation sits with the principal firm. Example: if you take financial advice from Serpentine Lake Capital, complaints and compensation usually follow the same rules as dealing with the principal, but this depends on the product and your circumstances. Before you proceed, confirm contact details match the official FCA register for both firms. Scammers sometimes clone legitimate AR names and FRNs but use fake phone numbers and websites.
What is Serpentine Lake Capital’s phone number?
The FCA register lists the phone number 07738 496172 for Serpentine Lake Capital. If you were given different contact details, use these to check with the firm before going any further.
Is Serpentine Lake Capital a scam or clone?
Serpentine Lake Capital is a genuine FCA-listed firm, and the FCA has published no warnings about fake versions of it. Scammers do copy real firms, though, so check that any contact details you were given match the ones on the register.
Is my money safe with Serpentine Lake Capital?
Protection works through Thornbridge Investment Management LLP, the principal firm responsible for Serpentine Lake Capital's regulated activity. FSCS cover and the Financial Ombudsman Service apply as they would to the principal.
Who owns Serpentine Lake Capital?
Companies House lists 2 people with significant control of Serpentine Lake Capital: Dt John Joseph Traynor (25–50% of votes) and Mr Richard John Hulf (25–50% of votes).
Who runs Serpentine Lake Capital?
Companies House lists 2 directors of Serpentine Lake Capital: Richard John Hulf and John Joseph Traynor.
How long has Serpentine Lake Capital been in business?
The company was formed on 15 November 2020.
What do Serpentine Lake Capital’s latest accounts show?
Its latest accounts, to 31 March 2025, show net assets of £316k (+98% from £160k) and cash at bank of £323k (+120% from £146k).
Does Serpentine Lake Capital use any other names?
It has previously used 3 other names: HydrogenOne Capital LLP, HydrogenOne and HydrogenOne Capital.

Sources and links

The full report on Serpentine Lake Capital LLP

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