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The above diagram shows the color scheme of the layout in the main result page. The parent entities and officers are those entities, including individual and legal persons, have significant controls over the company in focus. The offspring entities and appointments are those entities that the company in focus can influence on.

Clicking the links on parent entities or officers, and offspring entities or managed companies will put them in focus and show upstream or downstream connections. In general, ascendant entities can be found by moving toward upstream, and descendant entities are by toward downstream. In this way, progenitor entities such as grandparent companies (parents of parent), sibling companies (children of parent), partner companies (parents of child), and progeny entities such as grandchild companies (children of child) can be found easily.

Parent entities and officers 24
  • 1
    Walker, Katherine Ann
    Chartered Secretary born in September 1951
    Individual (21 offsprings)
    Officer
    1998-08-20 ~ 1999-01-20
    OF - Director → CIF 0
  • 2
    Blackwell, Louise Alison Clare
    Company Secretarial Manager born in January 1982
    Individual (91 offsprings)
    Officer
    2016-05-16 ~ 2018-01-18
    OF - Director → CIF 0
  • 3
    Humphreys, Richard Paul
    Corporate Treasurer born in November 1974
    Individual (5 offsprings)
    Officer
    2002-10-25 ~ 2003-06-30
    OF - Director → CIF 0
  • 4
    Graham, Max Steven
    Born in May 1979
    Individual (10 offsprings)
    Officer
    2025-04-01 ~ now
    OF - Director → CIF 0
  • 5
    Ryan, Christina Bridget
    Company Secretary born in December 1960
    Individual (140 offsprings)
    Officer
    2015-05-18 ~ 2025-03-31
    OF - Director → CIF 0
  • 6
    Fox, John William Alfred
    Tax Manager born in December 1957
    Individual (25 offsprings)
    Officer
    2001-05-21 ~ 2007-05-21
    OF - Director → CIF 0
  • 7
    Brierley, Heather Gwendolyn
    Chartered Secretary born in February 1971
    Individual (83 offsprings)
    Officer
    2005-09-06 ~ 2009-03-30
    OF - Director → CIF 0
  • 8
    Prior, Stephen John
    Chartered Secretary born in March 1953
    Individual (67 offsprings)
    Officer
    1998-08-20 ~ 2005-09-06
    OF - Director → CIF 0
  • 9
    Harris, Neil Richard
    Born in November 1968
    Individual (27 offsprings)
    Officer
    2019-11-07 ~ now
    OF - Director → CIF 0
  • 10
    Sams, David William Ian
    International Treasury Manager born in March 1970
    Individual (7 offsprings)
    Officer
    2001-07-06 ~ 2002-10-25
    OF - Director → CIF 0
  • 11
    Clark, John Arthur Kevin
    Group Tax Advisor born in March 1953
    Individual (23 offsprings)
    Officer
    1999-01-20 ~ 2001-05-21
    OF - Director → CIF 0
  • 12
    Sasse, Judith
    Solicitor born in February 1975
    Individual (25 offsprings)
    Officer
    2009-03-30 ~ 2010-07-01
    OF - Director → CIF 0
  • 13
    Gara, Antony John
    Company Secretary born in July 1974
    Individual (55 offsprings)
    Officer
    2019-11-07 ~ 2019-11-21
    OF - Director → CIF 0
    2024-09-25 ~ 2025-04-15
    OF - Director → CIF 0
  • 14
    Challis, John Christopher
    Chartered Secretary born in January 1953
    Individual (75 offsprings)
    Officer
    2008-08-04 ~ 2009-03-30
    OF - Director → CIF 0
  • 15
    Genikis, Mark Philip
    Accountant born in March 1961
    Individual (38 offsprings)
    Officer
    2003-06-30 ~ 2022-04-22
    OF - Director → CIF 0
  • 16
    Longden, Andrew William
    Chartered Accountant born in May 1957
    Individual (48 offsprings)
    Officer
    1999-01-20 ~ 2001-07-06
    OF - Director → CIF 0
  • 17
    Galvin, Laura
    Born in March 1979
    Individual (9 offsprings)
    Officer
    2025-05-08 ~ now
    OF - Director → CIF 0
  • 18
    Zielinski, Kathryn Alice
    Company Secretary born in August 1990
    Individual (19 offsprings)
    Officer
    2019-09-23 ~ 2022-11-30
    OF - Director → CIF 0
  • 19
    Allenby, Philip Norman
    Solicitor born in September 1960
    Individual (56 offsprings)
    Officer
    2010-07-01 ~ 2015-05-18
    OF - Director → CIF 0
  • 20
    Parry, Glyn
    Accountant born in February 1967
    Individual (13 offsprings)
    Officer
    2007-05-21 ~ 2018-12-04
    OF - Director → CIF 0
  • 21
    Harwood, Robert John
    Chartered Secretary born in March 1960
    Individual (78 offsprings)
    Officer
    1998-08-20 ~ 1999-01-20
    OF - Director → CIF 0
  • 22
    Mohun, Michael Joseph
    Company Secretary Manager born in November 1990
    Individual (32 offsprings)
    Officer
    2018-02-09 ~ 2019-10-04
    OF - Director → CIF 0
  • 23
    BT (INTERNATIONAL) HOLDINGS LIMITED
    - now 02216586
    BT TEN LIMITED - 1988-06-24
    1, Braham Street, London, United Kingdom
    Active Corporate (33 parents, 7 offsprings)
    Person with significant control
    2016-04-06 ~ now
    PE - Ownership of voting rights - 75% or moreCIF 0
    PE - Right to appoint or remove directorsCIF 0
    PE - Ownership of shares – 75% or moreCIF 0
  • 24
    NEWGATE STREET SECRETARIES LIMITED
    - now 02604359
    BT FORTY-TWO LIMITED - 1995-12-06
    1, Braham Street, London, England
    Active Corporate (52 parents, 217 offsprings)
    Officer
    1998-08-20 ~ now
    OF - Secretary → CIF 0
parent relation
Company in focus

BT FIFTY-ONE

Period: 1998-08-20 ~ now
Company number: 03621755
Registered name
BT FIFTY-ONE - now
Standard Industrial Classification
64209 - Activities Of Other Holding Companies N.e.c.

Related profiles found in government register
  • BT FIFTY-ONE
    Info
    Registered number 03621755
    1 Braham Street, London E1 8EE
    PRIVATE UNLIMITED COMPANY incorporated on 1998-08-20 (27 years 8 months). The status of the company number is Active.
    The last date of confirmation statement was made at 2025-08-22
    CIF 0
  • BT FIFTY-ONE
    S
    Registered number 3621755
    1, Braham Street, London, United Kingdom, E1 8EE
    Private Unlimited Company in Uk Companies House, United Kingdom
    CIF 1
    Unlimited With Shares in Companies House, England & Wales
    CIF 2
  • BT FIFTY-ONE
    S
    Registered number 3621755
    81, Newgate Street, London, United Kingdom, EC1A 7AJ
    Unlimited With Shares in Companies House, England & Wales
    CIF 3
child relation
Offspring entities and appointments 3
  • 1
    BT FIFTY-THREE LIMITED
    03621745
    1 Braham Street, London, United Kingdom
    Active Corporate (20 parents)
    Person with significant control
    2016-04-06 ~ now
    CIF 1 - Ownership of voting rights - 75% or more OE
    CIF 1 - Right to appoint or remove directors OE
    CIF 1 - Ownership of shares – 75% or more OE
  • 2
    BT FORTY-NINE
    03598157
    55 Baker Street, London
    Dissolved Corporate (21 parents)
    Person with significant control
    2018-03-16 ~ 2018-03-28
    CIF 3 - Ownership of voting rights - 75% or more OE
    CIF 3 - Right to appoint or remove directors OE
  • 3
    BT SIXTY-FOUR LIMITED
    04007415 02325907
    1 Braham Street, London, United Kingdom
    Active Corporate (21 parents, 7 offsprings)
    Person with significant control
    2016-04-06 ~ now
    CIF 2 - Ownership of shares – 75% or more OE
    CIF 2 - Ownership of voting rights - 75% or more OE
    CIF 2 - Right to appoint or remove directors OE

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Contains public sector information retrieved at 5 April 2026 and licensed under the Open Government Licence v3.0.