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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.

Jump to: Company in focus, Offsprings
Parent entities and officers 67
  • 1
    Adams, Robin William
    Born in March 1955
    Individual (9 offsprings)
    Officer
    2006-11-10 ~ 2008-07-01
    OF - Director → CIF 0
  • 2
    Ford, Douglas Moncrieff
    Born in July 1954
    Individual (4 offsprings)
    Officer
    1998-01-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 3
    Marshall, Paul Andrew
    Born in March 1961
    Individual (5 offsprings)
    Officer
    2006-07-17 ~ 2009-03-23
    OF - Director → CIF 0
  • 4
    Whitwell, Michael John
    Born in June 1952
    Individual (11 offsprings)
    Officer
    1997-07-21 ~ 2006-10-31
    OF - Director → CIF 0
  • 5
    Hatch, David Craig
    Born in November 1964
    Individual (9 offsprings)
    Officer
    2020-10-22 ~ now
    OF - Director → CIF 0
  • 6
    Scott, James Alexander
    Born in May 1961
    Individual (2 offsprings)
    Officer
    2004-07-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 7
    Farbridge, Caroline Louise
    Individual (158 offsprings)
    Officer
    2008-11-05 ~ 2010-10-15
    OF - Secretary → CIF 0
  • 8
    Deasy, John Vincent
    Born in April 1959
    Individual (3 offsprings)
    Officer
    2002-07-01 ~ 2008-05-21
    OF - Director → CIF 0
  • 9
    Hartley, Robert
    Born in March 1958
    Individual (65 offsprings)
    Officer
    1999-05-04 ~ 2009-04-14
    OF - Director → CIF 0
    Hartley, Robert
    Individual (65 offsprings)
    Officer
    1999-05-04 ~ 2006-07-01
    OF - Secretary → CIF 0
  • 10
    Kiernan, Peter Hartley
    Born in December 1952
    Individual (2 offsprings)
    Officer
    2004-01-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 11
    Connery, Denis Patrick
    Born in March 1957
    Individual (50 offsprings)
    Officer
    2004-01-01 ~ 2008-11-05
    OF - Director → CIF 0
    Connery, Denis Patrick
    Individual (50 offsprings)
    Officer
    2006-07-01 ~ 2008-11-05
    OF - Secretary → CIF 0
  • 12
    Jenkins, John William
    Born in April 1961
    Individual (7 offsprings)
    Officer
    2001-07-01 ~ 2008-07-01
    OF - Director → CIF 0
    2009-01-01 ~ 2009-12-07
    OF - Director → CIF 0
  • 13
    Dodds, Andrew
    Born in September 1968
    Individual (2 offsprings)
    Officer
    2004-07-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 14
    Wilson, Terence Benson
    Born in September 1941
    Individual (9 offsprings)
    Officer
    1999-10-06 ~ 2004-12-01
    OF - Director → CIF 0
  • 15
    Mccaffrey, Richard George, Mr.
    Born in June 1951
    Individual (11 offsprings)
    Officer
    2000-07-03 ~ 2008-01-24
    OF - Director → CIF 0
  • 16
    Lax, Noel Geoffrey
    Born in February 1959
    Individual (68 offsprings)
    Officer
    2006-10-30 ~ 2012-05-21
    OF - Director → CIF 0
  • 17
    Crichton-miller, David James Laurens
    Born in January 1963
    Individual (17 offsprings)
    Officer
    2010-01-22 ~ 2010-11-01
    OF - Director → CIF 0
  • 18
    Townend, Jeanne Carroll
    Born in April 1965
    Individual (9 offsprings)
    Officer
    2016-12-05 ~ 2018-01-15
    OF - Director → CIF 0
  • 19
    Kershaw, David Michael
    Born in August 1957
    Individual (2 offsprings)
    Officer
    2010-12-01 ~ 2012-03-05
    OF - Director → CIF 0
  • 20
    Fuller, Richard Anthony
    Born in October 1959
    Individual (1 offspring)
    Officer
    2006-07-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 21
    Thomson, Neil
    Born in June 1957
    Individual (2 offsprings)
    Officer
    2004-07-01 ~ 2007-02-28
    OF - Director → CIF 0
  • 22
    Everall, Terry Richard
    Born in January 1948
    Individual (4 offsprings)
    Officer
    1998-01-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 23
    Arber, Gareth George
    Individual (3 offsprings)
    Officer
    2010-11-25 ~ 2025-04-14
    OF - Secretary → CIF 0
  • 24
    Martin, Simon
    Born in June 1969
    Individual (7 offsprings)
    Officer
    2006-07-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 25
    Butler, Barrington Jeffrey Kerwin
    Born in October 1944
    Individual (4 offsprings)
    Officer
    1999-10-06 ~ 2002-07-01
    OF - Director → CIF 0
  • 26
    Hare, Richard Timothy
    Born in August 1962
    Individual (3 offsprings)
    Officer
    2003-03-01 ~ 2012-03-07
    OF - Director → CIF 0
  • 27
    Higgs, Alan John
    Born in August 1943
    Individual (3 offsprings)
    Officer
    (before 1991-10-04) ~ 2002-04-30
    OF - Director → CIF 0
  • 28
    Archibald, Kenneth Nisbet
    Born in April 1944
    Individual (3 offsprings)
    Officer
    1998-05-12 ~ 2004-07-01
    OF - Director → CIF 0
  • 29
    Holden, Timothy Arthur
    Born in November 1959
    Individual (7 offsprings)
    Officer
    2014-04-01 ~ 2016-11-23
    OF - Director → CIF 0
  • 30
    Morris, Clive Lee
    Born in November 1953
    Individual (5 offsprings)
    Officer
    2002-03-01 ~ 2005-07-01
    OF - Director → CIF 0
  • 31
    Hagues, Ian James
    Born in October 1950
    Individual (12 offsprings)
    Officer
    1997-07-18 ~ 1999-05-04
    OF - Director → CIF 0
    Hagues, Ian James
    Individual (12 offsprings)
    Officer
    1997-07-18 ~ 1999-05-04
    OF - Secretary → CIF 0
  • 32
    Hall, Lawrence Derek
    Individual (5 offsprings)
    Officer
    (before 1991-10-04) ~ 1997-07-18
    OF - Secretary → CIF 0
  • 33
    Ellingworth, Andrew
    Born in June 1967
    Individual (2 offsprings)
    Officer
    2006-07-01 ~ 2007-11-06
    OF - Director → CIF 0
  • 34
    Procter, Michael John
    Born in July 1952
    Individual (4 offsprings)
    Officer
    2000-01-04 ~ 2008-07-01
    OF - Director → CIF 0
  • 35
    Thorn, Glen
    Born in February 1959
    Individual (3 offsprings)
    Officer
    2012-03-05 ~ 2013-11-16
    OF - Director → CIF 0
  • 36
    Taylor, Michael Leonard
    Born in February 1947
    Individual (4 offsprings)
    Officer
    1997-07-21 ~ 2007-03-31
    OF - Director → CIF 0
  • 37
    Olver, Graham Dudley
    Born in May 1961
    Individual (45 offsprings)
    Officer
    2009-08-03 ~ 2014-01-01
    OF - Director → CIF 0
  • 38
    Gillespie, Andrew James
    Born in May 1969
    Individual (155 offsprings)
    Officer
    2010-10-14 ~ now
    OF - Director → CIF 0
  • 39
    Jackson, Mark Edward
    Born in June 1958
    Individual (7 offsprings)
    Officer
    2019-10-28 ~ 2020-10-22
    OF - Director → CIF 0
  • 40
    Allen, Richard Anthony
    Born in December 1960
    Individual (2 offsprings)
    Officer
    2010-12-01 ~ 2012-03-15
    OF - Director → CIF 0
  • 41
    Kippax, Alan
    Born in June 1938
    Individual (2 offsprings)
    Officer
    (before 1991-10-04) ~ 1998-06-30
    OF - Director → CIF 0
  • 42
    Purvis, John George
    Born in October 1947
    Individual (41 offsprings)
    Officer
    1992-12-15 ~ 2007-09-17
    OF - Director → CIF 0
  • 43
    Slota, Robert Emilion
    Born in September 1953
    Individual (1 offspring)
    Officer
    2002-03-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 44
    Taylor, David Charles
    Born in October 1954
    Individual (4 offsprings)
    Officer
    2004-07-01 ~ 2006-08-10
    OF - Director → CIF 0
  • 45
    Kara, Hanif Mohamed, Professor
    Born in August 1958
    Individual (8 offsprings)
    Officer
    2006-11-10 ~ 2008-07-01
    OF - Director → CIF 0
  • 46
    Anderson, Clive Drummond
    Born in July 1965
    Individual (8 offsprings)
    Officer
    2003-07-01 ~ 2007-11-06
    OF - Director → CIF 0
  • 47
    Williamson Taylor, Albert Olumuyiwa
    Born in April 1959
    Individual (6 offsprings)
    Officer
    2006-11-10 ~ 2008-07-01
    OF - Director → CIF 0
  • 48
    Hamer, Paul Christopher
    Born in March 1969
    Individual (34 offsprings)
    Officer
    2008-07-01 ~ 2010-12-13
    OF - Director → CIF 0
  • 49
    Walsh, Terence Geoffrey
    Born in January 1939
    Individual (2 offsprings)
    Officer
    1993-06-30 ~ 1996-12-31
    OF - Director → CIF 0
  • 50
    Winter, Sidney Keith, Dr
    Born in February 1950
    Individual (4 offsprings)
    Officer
    1992-12-15 ~ 2006-07-01
    OF - Director → CIF 0
  • 51
    Coackley, Richard James
    Born in December 1954
    Individual (10 offsprings)
    Officer
    2006-07-01 ~ 2009-03-23
    OF - Director → CIF 0
  • 52
    Rivett, John Martin
    Born in November 1947
    Individual (6 offsprings)
    Officer
    1997-07-21 ~ 2000-01-04
    OF - Director → CIF 0
  • 53
    Whitworth, Benjamin Warwick
    Born in August 1965
    Individual (98 offsprings)
    Officer
    2016-11-23 ~ 2016-12-05
    OF - Director → CIF 0
    2018-01-15 ~ 2019-10-31
    OF - Director → CIF 0
    Whitworth, Benjamin Warwick
    Individual (98 offsprings)
    Officer
    2011-05-03 ~ 2019-10-31
    OF - Secretary → CIF 0
  • 54
    Downie, Philip Charles George
    Born in March 1949
    Individual (4 offsprings)
    Officer
    1999-04-01 ~ 2004-01-01
    OF - Director → CIF 0
  • 55
    Whittaker, John David
    Chartered Town Planner born in September 1951
    Individual (11 offsprings)
    Officer
    2004-01-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 56
    Jones, Philip David
    Born in September 1956
    Individual (2 offsprings)
    Officer
    2004-07-01 ~ 2009-03-23
    OF - Director → CIF 0
  • 57
    Zukowski, Elizabeth Lina
    Born in June 1958
    Individual (2 offsprings)
    Officer
    2005-07-25 ~ 2008-07-01
    OF - Director → CIF 0
  • 58
    Brayson, William Richard
    Born in May 1946
    Individual (15 offsprings)
    Officer
    (before 1991-10-04) ~ 2003-12-17
    OF - Director → CIF 0
  • 59
    Dean, Michael John
    Born in March 1947
    Individual (4 offsprings)
    Officer
    1997-07-21 ~ 2008-07-01
    OF - Director → CIF 0
  • 60
    Wilton, David Charles
    Born in October 1962
    Individual (87 offsprings)
    Officer
    2009-02-10 ~ 2010-12-13
    OF - Director → CIF 0
  • 61
    Whiting, Walter Leonard
    Born in August 1933
    Individual (2 offsprings)
    Officer
    (before 1991-10-04) ~ 1992-12-31
    OF - Director → CIF 0
  • 62
    Ellyatt, David Paul
    Born in July 1950
    Individual (4 offsprings)
    Officer
    1992-12-15 ~ 2007-07-31
    OF - Director → CIF 0
  • 63
    Addison, Keith Robert
    Born in September 1949
    Individual (1 offspring)
    Officer
    2002-07-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 64
    Murdoch, Andrew James
    Individual (66 offsprings)
    Officer
    2025-04-14 ~ now
    OF - Secretary → CIF 0
  • 65
    Haynes, Lawrence John
    Director born in December 1952
    Individual (33 offsprings)
    Officer
    2007-06-18 ~ 2009-01-05
    OF - Director → CIF 0
  • 66
    Rogers, Jonathan Grant
    Born in March 1963
    Individual (7 offsprings)
    Officer
    2005-01-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 67
    TETRA TECH GROUP LIMITED
    - now 06595608
    WYG GROUP LIMITED - 2020-12-16 06595608
    3, Sovereign Square, Sovereign Street, Leeds, England
    Active Corporate (21 parents, 4 offsprings)
    Person with significant control
    2016-04-06 ~ now
    PE - Ownership of shares – 75% or more → CIF 0
parent relation
Company in focus

TETRA TECH LIMITED

Period: 2020-12-30 ~ now
Company number: 01959704
Registered names
TETRA TECH LIMITED - now
WHITE YOUNG LIMITED - 1986-02-07
BROXMILL LIMITED - 1985-12-20
Standard Industrial Classification
71129 - Other Engineering Activities
Related profiles found in government register
  • TETRA TECH LIMITED
    Info
    WYG ENGINEERING LIMITED - 2020-12-30
    WHITE YOUNG GREEN CONSULTING LIMITED - 2020-12-30
    WHITE YOUNG CONSULTING GROUP LIMITED - 2020-12-30
    WHITE YOUNG LIMITED - 2020-12-30
    BROXMILL LIMITED - 2020-12-30
    Registered number 01959704
    3 Sovereign Square, Sovereign Street, Leeds LS1 4ER
    PRIVATE LIMITED COMPANY incorporated on 1985-11-15 (40 years 8 months). The status of the company number is Active.
    The last date of confirmation statement was made at 2025-11-15
    CIF 0
  • TETRA TECH LIMITED
    S
    Registered number 01959704
    3 Sovereign Square, Sovereign Street, Leeds, England, LS1 4ER
    CIF 1
  • TETRA TECH LIMITED
    S
    Registered number 01959704
    3, Sovereign Sqaure, Sovereign Street, Leeds, England, LS1 4ER
    Limited By Shares in Companies House, United Kingdom
    CIF 2
  • TETRA TECH LIMITED
    S
    Registered number 01959704
    3, Sovereign Square, Sovereign Street, Leeds, England, LS1 4ER
    Limited By Shares in Companies House, United Kingdom
    CIF 3
  • TETRA TECH LIMITED
    S
    Registered number 01959704
    3, Sovereign Square, Sovereign Street, Leeds, England, LS1 4ER
    Limited Liability Company in Companies House, England
    CIF 4
  • TETRA TECH LIMITED
    S
    Registered number 01959704
    3, Sovereign Square, Sovereign Street, Leeds, United Kingdom, LS1 4ER
    Private Limited Company in Companies House, England And Wales
    CIF 5 CIF 6
    Private Limited Company in Companies House, United Kingdom
    CIF 7
  • TETRA TECH LIMITED
    S
    Registered number 01959704
    3, Sovereign Street, Leeds, England, LS1 4ER
    Limited Company in Companies House, United Kingdom
    CIF 8
  • WYG ENGINEERING LIMITED
    S
    Registered number 01959704
    Arndale Centre, Otley Road, Headingley, Leeds, England, LS6 2UJ
    Limited Liability Company in Companies House, England
    CIF 9
  • WYG ENGINEERING LIMITED
    S
    Registered number 01959704
    Arndale Court, Otley Road, Headingley, Leeds, England, LS6 2UJ
    Limited Liability Company in Companies House, England
    CIF 10
  • WYG ENGINEERING LIMITED
    S
    Registered number 01959704
    Wyg 22 Ltd, Arndale Centre, Otley Road, Leeds, England, LS6 2UJ
    Limited Liability Company in England
    CIF 11
(more)
(less)
child relation
Offspring entities and appointments 10
  • 1
    ARCADIS TETRA TECH 1 LIMITED
    17162691 17169076
    3 Sovereign Square, Sovereign Street, Leeds, United Kingdom
    Active Corporate (5 parents)
    Person with significant control
    2026-04-16 ~ now
    CIF 6 - Ownership of shares – More than 25% but not more than 50% → OE
    CIF 6 - Ownership of voting rights - More than 25% but not more than 50% → OE
  • 2
    ARCADIS TETRA TECH 2 LIMITED
    17169076 17162691
    3 Sovereign Square, Sovereign Street, Leeds, United Kingdom
    Active Corporate (5 parents)
    Person with significant control
    2026-04-20 ~ now
    CIF 5 - Ownership of shares – More than 25% but not more than 50% → OE
    CIF 5 - Ownership of voting rights - More than 25% but not more than 50% → OE
  • 3
    NUCLEAR DECOMMISSIONING LIMITED
    11952605
    3 Sovereign Square, Sovereign Street, Leeds, England
    Active Corporate (11 parents)
    Person with significant control
    2025-10-10 ~ now
    CIF 7 - Ownership of shares – More than 25% but not more than 50% → OE
    CIF 7 - Ownership of voting rights - More than 25% but not more than 50% → OE
    Officer
    2019-04-17 ~ now
    CIF 1 - Secretary → ME
  • 4
    TETRA TECH CONSULTING (NI) LIMITED
    - now NI667243
    TETRA TECH PROJECTS NORTHERN IRELAND LIMITED - 2020-03-18
    1 Locksley Business Park, Montgomery Road, Belfast, Northern Ireland
    Active Corporate (10 parents, 1 offspring)
    Person with significant control
    2021-02-23 ~ now
    CIF 8 - Ownership of shares – 75% or more → OE
  • 5
    TRENCH FARROW LIMITED
    - now 01433914
    TRENCH FARROW & PARTNERS LIMITED - 2002-11-26
    TRENCH FARROW & ASSOCIATES LIMITED - 1995-09-26
    DAVID TRENCH & ASSOCIATES LIMITED - 1986-06-11
    QUIZGATE LIMITED - 1979-12-31
    3 Sovereign Square, Sovereign Street, Leeds, England
    Active Corporate (17 parents)
    Person with significant control
    2016-04-06 ~ now
    CIF 3 - Right to appoint or remove directors → OE
    CIF 3 - Ownership of voting rights - 75% or more → OE
    CIF 3 - Ownership of shares – 75% or more → OE
  • 6
    WHITE YOUNG GREEN LIMITED
    - now 05111508 01869543
    WYG LIMITED - 2009-12-18
    WHITE YOUNG GREEN IPS LIMITED - 2008-06-16
    EVER 2354 LIMITED - 2004-05-14
    3 Sovereign Square, Sovereign Street, Leeds, England
    Active Corporate (12 parents)
    Person with significant control
    2016-04-06 ~ now
    CIF 2 - Right to appoint or remove directors → OE
    CIF 2 - Ownership of shares – 75% or more → OE
    CIF 2 - Ownership of voting rights - 75% or more → OE
  • 7
    WHITE YOUNG TRUSTEE LIMITED
    - now 02579388
    SIMCO 382 LIMITED - 1991-02-27
    Arndale Court Otley Road, Headingley, Leeds
    Dissolved Corporate (14 parents)
    Person with significant control
    2016-04-06 ~ dissolved
    CIF 10 - Ownership of shares – 75% or more → OE
  • 8
    ADAMS KARA TAYLOR LIMITED - 2011-03-31
    KARA TAYLOR ENGINEERS LIMITED - 1997-08-14
    Arndale Court Otley Road, Headingley, Leeds
    Dissolved Corporate (16 parents)
    Person with significant control
    2016-04-06 ~ dissolved
    CIF 11 - Ownership of shares – 75% or more → OE
  • 9
    WYG ENGINEERING (NORTHERN IRELAND) LIMITED
    - now NI020346
    Insolvency (Case 1) In administration
    Administration started on 2022-10-07
    Administration ended on 2024-03-28
    Insolvency (Case 2) Creditors voluntary liquidation
    Commencement of winding up on 2024-03-28
    Dissolved on 2025-06-28
    PHILIP DOWNIE AND ASSOCIATES LIMITED - 2004-11-12
    PHILIP DOWNIE AND ASSOCIATES - 1994-11-15
    C/o A&l Goodbody Northern Ireland Llp, 42-46 Fountain Street, Belfast
    Dissolved Corporate (27 parents)
    Person with significant control
    2016-04-06 ~ 2021-02-23
    CIF 4 - Ownership of shares – 75% or more → OE
  • 10
    WYNTHOMASGORDONLEWIS LIMITED
    - now 03837186
    MC52 LIMITED - 2000-03-10
    Arndale Court Otley Road, Headingley, Leeds
    Dissolved Corporate (23 parents)
    Person with significant control
    2016-04-06 ~ dissolved
    CIF 9 - Ownership of shares – 75% or more → OE

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Contains public sector information retrieved at 14 July 2026 and licensed under the Open Government Licence v3.0.