Lseg B3 Limited: FCA regulated?

Authorised by the FCA

This firm is on the FCA register and authorised to carry out regulated activities.

Authorised for 1 year
Your funds are protected by FSCS
No FCA actions
Active company since 2024

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.

Website

lseg.com (opens in a new tab)
Phone number

020 7797 1000
Address

LSEG B3 Ltd, 10 Paternoster Square, London, City Of London, EC4M 7LS, United Kingdom

In the full report: 3 background checks

When lseg.com first appeared online, and whether it can receive email
What kind of line 020 7797 1000 is, and the 4 other firms that give it
Who else gives the postcode EC4M 7LS

FCA permissions and consumer protection

Investments & pensions FSCS may apply
Eligible investment and pension claims are typically FSCS-protected up to £85,000 per person, depending on the product and your circumstances.
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: 15890870 (opens Companies House in a new tab)
Company status: Active
Company type: Private limited company
Incorporated: 12 August 2024 (2 years old)
Registered office: 10 Paternoster Square, London, EC4M 7LS, England
Nature of business: Information technology consultancy activities (SIC 62020)
Other information technology service activities (SIC 62090)

Directors and company secretaries

Name	Role	Born	Appointed	Other companies
Robert Ian Cairns	Director	Feb 1973	12 Aug 2024	2 other companies
Darko Hajdukovic	Director	Jun 1979	7 Jan 2025	2 other companies
Julia Anne Hoggett (Dame)	Director	Sep 1973	7 Jan 2025	3 other companies
Sarah Louise Macfarlane	Director	Mar 1978	31 Mar 2025	1 other company
Carla Jane O'Hanlon	Secretary	Not published	12 Aug 2024	–

Other companies run by these 4 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: 8
still active: 8
are FCA-registered: 2

In the full report: all 8 companies, named

What each company does, and whether it is still trading
Which of these 4 directors sit on each board, and since when
Any that went into liquidation or administration
The 2 on the FCA register, including one no longer authorised
All 7 people who have ever been directors, with their dates

Key dates in its history

Lseg B3’s history from the FCA register and Companies House, newest first.

Key events (4) All events (15)

2025

7 April 2025

Regulated by the FCA from this date
Became authorised by the FCA

FCA register

2024

12 August 2024

Incorporated at Companies House
Lseg B1 Limited took control (75–100% of shares)

Companies House

In the full report: all 15 events

All 15 events in its history (4 shown here)
Every director appointment and resignation: 10

Firms connected to Lseg B3

Other FCA-listed firms that share a director, phone number or address with Lseg B3. A link shows who the firm is tied to, not whether either can be trusted.

connected firms: 4
share a director: 2
share its phone number: 4

In the full report: all 4 connected firms, named

How each is linked: shared directors (2), the same phone number (4), the same postcode (4)
Who links each one: the named directors, with dates

Get the full report on Lseg B3

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

8 other companies its directors have run, named
3 background checks on its contact details
All 15 events in its history
4 connected firms, named, and who links them

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Frequently asked questions about this firm

Is Lseg B3 Limited FCA authorised?

Yes, Lseg B3 Limited (FRN 1020541) is authorised by the FCA to carry out regulated activities. It has held its current authorisation since April 2025. The FCA has placed no limits on its permissions.

What is Lseg B3’s phone number and website?

The FCA register lists the phone number 020 7797 1000 and the website lseg.com for Lseg B3. If you were given different contact details, use these to check with the firm before going any further. The same number is also given by 4 other FCA firms.

Is Lseg B3 a scam or clone?

Lseg B3 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 Lseg B3?

Its FCA permissions do not allow it to hold or control client money. It depends on the product, but eligible claims may be protected by the FSCS. You can also refer complaints about Lseg B3 to the Financial Ombudsman Service, free of charge.

Who owns Lseg B3?

Lseg B3 is owned by Lseg B1 Limited, which holds 75–100% of shares, 75–100% of votes and can appoint and remove the board, since 12 August 2024.

Who runs Lseg B3?

Companies House lists 4 directors of Lseg B3: Robert Ian Cairns, Darko Hajdukovic, Julia Anne Hoggett (Dame) and Sarah Louise Macfarlane.

How long has Lseg B3 been in business?

The company was formed on 12 August 2024, and has held its current FCA authorisation since April 2025.