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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
    Townend, Jeanne Carroll
    Managing Director born in April 1965
    Individual (9 offsprings)
    Officer
    2016-12-05 ~ 2018-01-15
    OF - Director → CIF 0
  • 2
    Holden, Timothy Arthur
    Chartered Town Planner born in November 1959
    Individual (6 offsprings)
    Officer
    2014-04-01 ~ 2016-11-23
    OF - Director → CIF 0
  • 3
    Taylor, David Charles
    Director born in October 1954
    Individual (3 offsprings)
    Officer
    2004-07-01 ~ 2006-08-10
    OF - Director → CIF 0
  • 4
    Kiernan, Peter Hartley
    Civil Servant born in December 1952
    Individual (2 offsprings)
    Officer
    2004-01-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 5
    Everall, Terry Richard
    Engineer born in January 1948
    Individual (4 offsprings)
    Officer
    1998-01-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 6
    Coackley, Richard James
    Director born in December 1954
    Individual (10 offsprings)
    Officer
    2006-07-01 ~ 2009-03-23
    OF - Director → CIF 0
  • 7
    Farbridge, Caroline Louise
    Chartered Secretary
    Individual (30 offsprings)
    Officer
    2008-11-05 ~ 2010-10-15
    OF - Secretary → CIF 0
  • 8
    Purvis, John George
    Chartered Engineer born in October 1947
    Individual (26 offsprings)
    Officer
    1992-12-15 ~ 2007-09-17
    OF - Director → CIF 0
  • 9
    Williamson Taylor, Albert Olumuyiwa
    Chartered Engineer born in April 1959
    Individual (6 offsprings)
    Officer
    2006-11-10 ~ 2008-07-01
    OF - Director → CIF 0
  • 10
    Whitworth, Benjamin Warwick
    Solicitor 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
  • 11
    Ellyatt, David Paul
    Engineer born in July 1950
    Individual (4 offsprings)
    Officer
    1992-12-15 ~ 2007-07-31
    OF - Director → CIF 0
  • 12
    Whitwell, Michael John
    Chartered Civil Engineer born in June 1952
    Individual (11 offsprings)
    Officer
    1997-07-21 ~ 2006-10-31
    OF - Director → CIF 0
  • 13
    Procter, Michael John
    Engineer born in July 1952
    Individual (4 offsprings)
    Officer
    2000-01-04 ~ 2008-07-01
    OF - Director → CIF 0
  • 14
    Morris, Clive Lee
    Engineer born in November 1953
    Individual (3 offsprings)
    Officer
    2002-03-01 ~ 2005-07-01
    OF - Director → CIF 0
  • 15
    Scott, James Alexander
    Civil Engineer born in May 1961
    Individual (2 offsprings)
    Officer
    2004-07-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 16
    Kippax, Alan
    Chartered Engineer born in June 1938
    Individual (2 offsprings)
    Officer
    ~ 1998-06-30
    OF - Director → CIF 0
  • 17
    Allen, Richard Anthony
    Consulting Engineer born in December 1960
    Individual (2 offsprings)
    Officer
    2010-12-01 ~ 2012-03-15
    OF - Director → CIF 0
  • 18
    Deasy, John Vincent
    Director born in April 1959
    Individual (3 offsprings)
    Officer
    2002-07-01 ~ 2008-05-21
    OF - Director → CIF 0
  • 19
    Whittaker, John David
    Chartered Town Planner born in September 1951
    Individual (10 offsprings)
    Officer
    2004-01-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 20
    Taylor, Michael Leonard
    Consulting Engineer born in February 1947
    Individual (4 offsprings)
    Officer
    1997-07-21 ~ 2007-03-31
    OF - Director → CIF 0
  • 21
    Downie, Philip Charles George
    Engineer born in March 1949
    Individual (4 offsprings)
    Officer
    1999-04-01 ~ 2004-01-01
    OF - Director → CIF 0
  • 22
    Addison, Keith Robert
    Director born in September 1949
    Individual (1 offspring)
    Officer
    2002-07-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 23
    Ellingworth, Andrew
    Director born in June 1967
    Individual (2 offsprings)
    Officer
    2006-07-01 ~ 2007-11-06
    OF - Director → CIF 0
  • 24
    Jenkins, John William
    Engineer born in April 1961
    Individual (7 offsprings)
    Officer
    2001-07-01 ~ 2008-07-01
    OF - Director → CIF 0
    Jenkins, John William
    Director born in April 1961
    Individual (7 offsprings)
    2009-01-01 ~ 2009-12-07
    OF - Director → CIF 0
  • 25
    Winter, Sidney Keith, Dr
    Chartered Engineer born in February 1950
    Individual (4 offsprings)
    Officer
    1992-12-15 ~ 2006-07-01
    OF - Director → CIF 0
  • 26
    Anderson, Clive Drummond
    Engineer born in July 1965
    Individual (6 offsprings)
    Officer
    2003-07-01 ~ 2007-11-06
    OF - Director → CIF 0
  • 27
    Hagues, Ian James
    Company Secretary born in October 1950
    Individual (12 offsprings)
    Officer
    1997-07-18 ~ 1999-05-04
    OF - Director → CIF 0
    Hagues, Ian James
    Company Secretary
    Individual (12 offsprings)
    Officer
    1997-07-18 ~ 1999-05-04
    OF - Secretary → CIF 0
  • 28
    Hartley, Robert
    Chartered Accountant born in March 1958
    Individual (45 offsprings)
    Officer
    1999-05-04 ~ 2009-04-14
    OF - Director → CIF 0
    Hartley, Robert
    Chartered Accountant
    Individual (45 offsprings)
    Officer
    1999-05-04 ~ 2006-07-01
    OF - Secretary → CIF 0
  • 29
    Wilton, David Charles
    Director born in October 1962
    Individual (78 offsprings)
    Officer
    2009-02-10 ~ 2010-12-13
    OF - Director → CIF 0
  • 30
    Jones, Philip David
    Civil Engineer born in September 1956
    Individual (2 offsprings)
    Officer
    2004-07-01 ~ 2009-03-23
    OF - Director → CIF 0
  • 31
    Connery, Denis Patrick
    Company Director born in March 1957
    Individual (35 offsprings)
    Officer
    2004-01-01 ~ 2008-11-05
    OF - Director → CIF 0
    Connery, Denis Patrick
    Director
    Individual (35 offsprings)
    Officer
    2006-07-01 ~ 2008-11-05
    OF - Secretary → CIF 0
  • 32
    Haynes, Lawrence John
    Director born in December 1952
    Individual (33 offsprings)
    Officer
    2007-06-18 ~ 2009-01-05
    OF - Director → CIF 0
  • 33
    Brayson, William Richard
    Chartered Accountant born in May 1946
    Individual (12 offsprings)
    Officer
    ~ 2003-12-17
    OF - Director → CIF 0
  • 34
    Olver, Graham Dudley
    Director born in May 1961
    Individual (32 offsprings)
    Officer
    2009-08-03 ~ 2014-01-01
    OF - Director → CIF 0
  • 35
    Gillespie, Andrew James
    Born in May 1969
    Individual (150 offsprings)
    Officer
    2010-10-14 ~ now
    OF - Director → CIF 0
  • 36
    Slota, Robert Emilion
    Consulting Engineer born in September 1953
    Individual (1 offspring)
    Officer
    2002-03-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 37
    Fuller, Richard Anthony
    Director born in October 1959
    Individual (1 offspring)
    Officer
    2006-07-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 38
    Rivett, John Martin
    Consulting Engineer born in November 1947
    Individual (6 offsprings)
    Officer
    1997-07-21 ~ 2000-01-04
    OF - Director → CIF 0
  • 39
    Kara, Hanif Mohamed, Professor
    Company Director born in August 1958
    Individual (8 offsprings)
    Officer
    2006-11-10 ~ 2008-07-01
    OF - Director → CIF 0
  • 40
    Hare, Richard Timothy
    Engineer born in August 1962
    Individual (3 offsprings)
    Officer
    2003-03-01 ~ 2012-03-07
    OF - Director → CIF 0
  • 41
    Walsh, Terence Geoffrey
    Consulting Engineer born in January 1939
    Individual (2 offsprings)
    Officer
    1993-06-30 ~ 1996-12-31
    OF - Director → CIF 0
  • 42
    Murdoch, Andrew James
    Individual (63 offsprings)
    Officer
    2025-04-14 ~ now
    OF - Secretary → CIF 0
  • 43
    Wilson, Terence Benson
    Consulting Engineer born in September 1941
    Individual (7 offsprings)
    Officer
    1999-10-06 ~ 2004-12-01
    OF - Director → CIF 0
  • 44
    Hatch, David Craig
    Born in November 1964
    Individual (9 offsprings)
    Officer
    2020-10-22 ~ now
    OF - Director → CIF 0
  • 45
    Arber, Gareth George
    Individual (3 offsprings)
    Officer
    2010-11-25 ~ 2025-04-14
    OF - Secretary → CIF 0
  • 46
    Jackson, Mark Edward
    Director born in June 1958
    Individual (7 offsprings)
    Officer
    2019-10-28 ~ 2020-10-22
    OF - Director → CIF 0
  • 47
    Martin, Simon
    Director born in June 1969
    Individual (7 offsprings)
    Officer
    2006-07-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 48
    Marshall, Paul Andrew
    Director born in March 1961
    Individual (5 offsprings)
    Officer
    2006-07-17 ~ 2009-03-23
    OF - Director → CIF 0
  • 49
    Butler, Barrington Jeffrey Kerwin
    Chartered Engineer born in October 1944
    Individual (2 offsprings)
    Officer
    1999-10-06 ~ 2002-07-01
    OF - Director → CIF 0
  • 50
    Thomson, Neil
    Engineer born in June 1957
    Individual (2 offsprings)
    Officer
    2004-07-01 ~ 2007-02-28
    OF - Director → CIF 0
  • 51
    Kershaw, David Michael
    Company Director born in August 1957
    Individual (2 offsprings)
    Officer
    2010-12-01 ~ 2012-03-05
    OF - Director → CIF 0
  • 52
    Crichton-miller, David James Laurens
    Born in January 1963
    Individual (17 offsprings)
    Officer
    2010-01-22 ~ 2010-11-01
    OF - Director → CIF 0
  • 53
    Mccaffrey, Richard George, Mr.
    Engineer born in June 1951
    Individual (10 offsprings)
    Officer
    2000-07-03 ~ 2008-01-24
    OF - Director → CIF 0
  • 54
    Dean, Michael John
    Consulting Engineer born in March 1947
    Individual (4 offsprings)
    Officer
    1997-07-21 ~ 2008-07-01
    OF - Director → CIF 0
  • 55
    Hamer, Paul Christopher
    Director born in March 1969
    Individual (27 offsprings)
    Officer
    2008-07-01 ~ 2010-12-13
    OF - Director → CIF 0
  • 56
    Higgs, Alan John
    Chartered Engineer born in August 1943
    Individual (3 offsprings)
    Officer
    ~ 2002-04-30
    OF - Director → CIF 0
  • 57
    Zukowski, Elizabeth Lina
    Director born in June 1958
    Individual (2 offsprings)
    Officer
    2005-07-25 ~ 2008-07-01
    OF - Director → CIF 0
  • 58
    Archibald, Kenneth Nisbet
    Consulting Engineer born in April 1944
    Individual (3 offsprings)
    Officer
    1998-05-12 ~ 2004-07-01
    OF - Director → CIF 0
  • 59
    Dodds, Andrew
    Engineer born in September 1968
    Individual (2 offsprings)
    Officer
    2004-07-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 60
    Rogers, Jonathan Grant
    Director born in March 1963
    Individual (7 offsprings)
    Officer
    2005-01-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 61
    Lax, Noel Geoffrey
    Director born in February 1959
    Individual (57 offsprings)
    Officer
    2006-10-30 ~ 2012-05-21
    OF - Director → CIF 0
  • 62
    Hall, Lawrence Derek
    Individual (5 offsprings)
    Officer
    ~ 1997-07-18
    OF - Secretary → CIF 0
  • 63
    Whiting, Walter Leonard
    Chartered Engineer born in August 1933
    Individual (2 offsprings)
    Officer
    ~ 1992-12-31
    OF - Director → CIF 0
  • 64
    Ford, Douglas Moncrieff
    Chartered Engineer born in July 1954
    Individual (4 offsprings)
    Officer
    1998-01-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 65
    Thorn, Glen
    Director born in February 1959
    Individual (2 offsprings)
    Officer
    2012-03-05 ~ 2013-11-16
    OF - Director → CIF 0
  • 66
    Adams, Robin William
    Director born in March 1955
    Individual (9 offsprings)
    Officer
    2006-11-10 ~ 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 4 months). The company status is Active.
    The last date of confirmation statement was made at 2024-11-15
    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
(more)
child relation
Offspring entities and appointments 8
  • 1
    NUCLEAR DECOMMISSIONING LIMITED
    11952605 04047465
    3 Sovereign Square, Sovereign Street, Leeds, England
    Active Corporate (9 parents)
    Officer
    2019-04-17 ~ now
    CIF 1 - Secretary → ME
  • 2
    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 5 - Ownership of shares – 75% or more → OE
  • 3
    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
  • 4
    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 voting rights - 75% or more → OE
    CIF 2 - Ownership of shares – 75% or more → OE
  • 5
    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 7 - Ownership of shares – 75% or more → OE
  • 6
    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 8 - Ownership of shares – 75% or more → OE
  • 7
    WYG ENGINEERING (NORTHERN IRELAND) LIMITED
    - now NI020346
    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 (24 parents)
    Person with significant control
    2016-04-06 ~ 2021-02-23
    CIF 4 - Ownership of shares – 75% or more → OE
  • 8
    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 6 - Ownership of shares – 75% or more → OE

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Contains public sector information retrieved at 9 February 2026 and licensed under the Open Government Licence v3.0.