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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
Active 4
  • 1
    Hatch, David Craig
    Born in November 1964
    Individual (9 offsprings)
    Officer
    icon of calendar 2020-10-22 ~ now
    OF - Director → CIF 0
  • 2
    Gillespie, Andrew James
    Born in May 1969
    Individual (57 offsprings)
    Officer
    icon of calendar 2010-10-14 ~ now
    OF - Director → CIF 0
  • 3
    Murdoch, Andrew James
    Individual (62 offsprings)
    Officer
    icon of calendar 2025-04-14 ~ now
    OF - Secretary → CIF 0
  • 4
    WYG GROUP LIMITED - 2020-12-16
    icon of address3, Sovereign Square, Sovereign Street, Leeds, England
    Active Corporate (5 parents, 4 offsprings)
    Person with significant control
    icon of calendar 2016-04-06 ~ now
    PE - Ownership of shares – 75% or more → CIF 0
Ceased 63
  • 1
    Olver, Graham Dudley
    Director born in May 1961
    Individual (2 offsprings)
    Officer
    icon of calendar 2009-08-03 ~ 2014-01-01
    OF - Director → CIF 0
  • 2
    Zukowski, Elizabeth Lina
    Director born in June 1958
    Individual
    Officer
    icon of calendar 2005-07-25 ~ 2008-07-01
    OF - Director → CIF 0
  • 3
    Anderson, Clive Drummond
    Engineer born in July 1965
    Individual (1 offspring)
    Officer
    icon of calendar 2003-07-01 ~ 2007-11-06
    OF - Director → CIF 0
  • 4
    Kershaw, David Michael
    Company Director born in August 1957
    Individual (1 offspring)
    Officer
    icon of calendar 2010-12-01 ~ 2012-03-05
    OF - Director → CIF 0
  • 5
    Wilson, Terence Benson
    Consulting Engineer born in September 1941
    Individual (5 offsprings)
    Officer
    icon of calendar 1999-10-06 ~ 2004-12-01
    OF - Director → CIF 0
  • 6
    Jenkins, John William
    Engineer born in April 1961
    Individual (1 offspring)
    Officer
    icon of calendar 2001-07-01 ~ 2008-07-01
    OF - Director → CIF 0
    Jenkins, John William
    Director born in April 1961
    Individual (1 offspring)
    icon of calendar 2009-01-01 ~ 2009-12-07
    OF - Director → CIF 0
  • 7
    Hare, Richard Timothy
    Engineer born in August 1962
    Individual (1 offspring)
    Officer
    icon of calendar 2003-03-01 ~ 2012-03-07
    OF - Director → CIF 0
  • 8
    Butler, Barrington Jeffrey Kerwin
    Chartered Engineer born in October 1944
    Individual
    Officer
    icon of calendar 1999-10-06 ~ 2002-07-01
    OF - Director → CIF 0
  • 9
    Taylor, David Charles
    Director born in October 1954
    Individual
    Officer
    icon of calendar 2004-07-01 ~ 2006-08-10
    OF - Director → CIF 0
  • 10
    Kara, Hanif Mohamed, Professor
    Company Director born in August 1958
    Individual (4 offsprings)
    Officer
    icon of calendar 2006-11-10 ~ 2008-07-01
    OF - Director → CIF 0
  • 11
    Thorn, Glen
    Director born in February 1959
    Individual
    Officer
    icon of calendar 2012-03-05 ~ 2013-11-16
    OF - Director → CIF 0
  • 12
    Rogers, Jonathan Grant
    Director born in March 1963
    Individual (2 offsprings)
    Officer
    icon of calendar 2005-01-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 13
    Everall, Terry Richard
    Engineer born in January 1948
    Individual (1 offspring)
    Officer
    icon of calendar 1998-01-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 14
    Ford, Douglas Moncrieff
    Chartered Engineer born in July 1954
    Individual
    Officer
    icon of calendar 1998-01-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 15
    Haynes, Lawrence John
    Director born in December 1952
    Individual (3 offsprings)
    Officer
    icon of calendar 2007-06-18 ~ 2009-01-05
    OF - Director → CIF 0
  • 16
    Fuller, Richard Anthony
    Director born in October 1959
    Individual
    Officer
    icon of calendar 2006-07-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 17
    Winter, Sidney Keith, Dr
    Chartered Engineer born in February 1950
    Individual (2 offsprings)
    Officer
    icon of calendar 1992-12-15 ~ 2006-07-01
    OF - Director → CIF 0
  • 18
    Downie, Philip Charles George
    Engineer born in March 1949
    Individual (1 offspring)
    Officer
    icon of calendar 1999-04-01 ~ 2004-01-01
    OF - Director → CIF 0
  • 19
    Hartley, Robert
    Chartered Accountant born in March 1958
    Individual (5 offsprings)
    Officer
    icon of calendar 1999-05-04 ~ 2009-04-14
    OF - Director → CIF 0
    Hartley, Robert
    Chartered Accountant
    Individual (5 offsprings)
    Officer
    icon of calendar 1999-05-04 ~ 2006-07-01
    OF - Secretary → CIF 0
  • 20
    Dodds, Andrew
    Engineer born in September 1968
    Individual (1 offspring)
    Officer
    icon of calendar 2004-07-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 21
    Archibald, Kenneth Nisbet
    Consulting Engineer born in April 1944
    Individual (2 offsprings)
    Officer
    icon of calendar 1998-05-12 ~ 2004-07-01
    OF - Director → CIF 0
  • 22
    Higgs, Alan John
    Chartered Engineer born in August 1943
    Individual
    Officer
    icon of calendar ~ 2002-04-30
    OF - Director → CIF 0
  • 23
    Arber, Gareth George
    Individual (2 offsprings)
    Officer
    icon of calendar 2010-11-25 ~ 2025-04-14
    OF - Secretary → CIF 0
  • 24
    Hall, Lawrence Derek
    Individual (2 offsprings)
    Officer
    icon of calendar ~ 1997-07-18
    OF - Secretary → CIF 0
  • 25
    Townend, Jeanne Carroll
    Managing Director born in April 1965
    Individual (2 offsprings)
    Officer
    icon of calendar 2016-12-05 ~ 2018-01-15
    OF - Director → CIF 0
  • 26
    Procter, Michael John
    Engineer born in July 1952
    Individual (2 offsprings)
    Officer
    icon of calendar 2000-01-04 ~ 2008-07-01
    OF - Director → CIF 0
  • 27
    Dean, Michael John
    Consulting Engineer born in March 1947
    Individual (1 offspring)
    Officer
    icon of calendar 1997-07-21 ~ 2008-07-01
    OF - Director → CIF 0
  • 28
    Rivett, John Martin
    Consulting Engineer born in November 1947
    Individual
    Officer
    icon of calendar 1997-07-21 ~ 2000-01-04
    OF - Director → CIF 0
  • 29
    Whittaker, John David
    Chartered Town Planner born in September 1951
    Individual (3 offsprings)
    Officer
    icon of calendar 2004-01-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 30
    Martin, Simon
    Director born in June 1969
    Individual (4 offsprings)
    Officer
    icon of calendar 2006-07-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 31
    Mccaffrey, Richard George, Mr.
    Engineer born in June 1951
    Individual (2 offsprings)
    Officer
    icon of calendar 2000-07-03 ~ 2008-01-24
    OF - Director → CIF 0
  • 32
    Addison, Keith Robert
    Director born in September 1949
    Individual
    Officer
    icon of calendar 2002-07-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 33
    Scott, James Alexander
    Civil Engineer born in May 1961
    Individual (1 offspring)
    Officer
    icon of calendar 2004-07-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 34
    Jackson, Mark Edward
    Director born in June 1958
    Individual (1 offspring)
    Officer
    icon of calendar 2019-10-28 ~ 2020-10-22
    OF - Director → CIF 0
  • 35
    Hamer, Paul Christopher
    Director born in March 1969
    Individual (1 offspring)
    Officer
    icon of calendar 2008-07-01 ~ 2010-12-13
    OF - Director → CIF 0
  • 36
    Coackley, Richard James
    Director born in December 1954
    Individual
    Officer
    icon of calendar 2006-07-01 ~ 2009-03-23
    OF - Director → CIF 0
  • 37
    Williamson Taylor, Albert Olumuyiwa
    Chartered Engineer born in April 1959
    Individual (3 offsprings)
    Officer
    icon of calendar 2006-11-10 ~ 2008-07-01
    OF - Director → CIF 0
  • 38
    Crichton-miller, David James Laurens
    Director born in January 1963
    Individual (9 offsprings)
    Officer
    icon of calendar 2010-01-22 ~ 2010-11-01
    OF - Director → CIF 0
  • 39
    Brayson, William Richard
    Chartered Accountant born in May 1946
    Individual (1 offspring)
    Officer
    icon of calendar ~ 2003-12-17
    OF - Director → CIF 0
  • 40
    Whiting, Walter Leonard
    Chartered Engineer born in August 1933
    Individual
    Officer
    icon of calendar ~ 1992-12-31
    OF - Director → CIF 0
  • 41
    Ellingworth, Andrew
    Director born in June 1967
    Individual
    Officer
    icon of calendar 2006-07-01 ~ 2007-11-06
    OF - Director → CIF 0
  • 42
    Allen, Richard Anthony
    Consulting Engineer born in December 1960
    Individual (1 offspring)
    Officer
    icon of calendar 2010-12-01 ~ 2012-03-15
    OF - Director → CIF 0
  • 43
    Deasy, John Vincent
    Director born in April 1959
    Individual (2 offsprings)
    Officer
    icon of calendar 2002-07-01 ~ 2008-05-21
    OF - Director → CIF 0
  • 44
    Walsh, Terence Geoffrey
    Consulting Engineer born in January 1939
    Individual
    Officer
    icon of calendar 1993-06-30 ~ 1996-12-31
    OF - Director → CIF 0
  • 45
    Purvis, John George
    Chartered Engineer born in October 1947
    Individual (1 offspring)
    Officer
    icon of calendar 1992-12-15 ~ 2007-09-17
    OF - Director → CIF 0
  • 46
    Hagues, Ian James
    Company Secretary born in October 1950
    Individual (2 offsprings)
    Officer
    icon of calendar 1997-07-18 ~ 1999-05-04
    OF - Director → CIF 0
    Hagues, Ian James
    Company Secretary
    Individual (2 offsprings)
    Officer
    icon of calendar 1997-07-18 ~ 1999-05-04
    OF - Secretary → CIF 0
  • 47
    Whitworth, Benjamin Warwick
    Solicitor born in August 1965
    Individual (20 offsprings)
    Officer
    icon of calendar 2016-11-23 ~ 2016-12-05
    OF - Director → CIF 0
    icon of calendar 2018-01-15 ~ 2019-10-31
    OF - Director → CIF 0
    Whitworth, Benjamin Warwick
    Individual (20 offsprings)
    Officer
    icon of calendar 2011-05-03 ~ 2019-10-31
    OF - Secretary → CIF 0
  • 48
    Jones, Philip David
    Civil Engineer born in September 1956
    Individual
    Officer
    icon of calendar 2004-07-01 ~ 2009-03-23
    OF - Director → CIF 0
  • 49
    Whitwell, Michael John
    Chartered Civil Engineer born in June 1952
    Individual (2 offsprings)
    Officer
    icon of calendar 1997-07-21 ~ 2006-10-31
    OF - Director → CIF 0
  • 50
    Kippax, Alan
    Chartered Engineer born in June 1938
    Individual
    Officer
    icon of calendar ~ 1998-06-30
    OF - Director → CIF 0
  • 51
    Ellyatt, David Paul
    Engineer born in July 1950
    Individual (2 offsprings)
    Officer
    icon of calendar 1992-12-15 ~ 2007-07-31
    OF - Director → CIF 0
  • 52
    Lax, Noel Geoffrey
    Director born in February 1959
    Individual
    Officer
    icon of calendar 2006-10-30 ~ 2012-05-21
    OF - Director → CIF 0
  • 53
    Thomson, Neil
    Engineer born in June 1957
    Individual
    Officer
    icon of calendar 2004-07-01 ~ 2007-02-28
    OF - Director → CIF 0
  • 54
    Connery, Denis Patrick
    Company Director born in March 1957
    Individual (1 offspring)
    Officer
    icon of calendar 2004-01-01 ~ 2008-11-05
    OF - Director → CIF 0
    Connery, Denis Patrick
    Director
    Individual (1 offspring)
    Officer
    icon of calendar 2006-07-01 ~ 2008-11-05
    OF - Secretary → CIF 0
  • 55
    Adams, Robin William
    Director born in March 1955
    Individual (2 offsprings)
    Officer
    icon of calendar 2006-11-10 ~ 2008-07-01
    OF - Director → CIF 0
  • 56
    Farbridge, Caroline Louise
    Chartered Secretary
    Individual
    Officer
    icon of calendar 2008-11-05 ~ 2010-10-15
    OF - Secretary → CIF 0
  • 57
    Taylor, Michael Leonard
    Consulting Engineer born in February 1947
    Individual (1 offspring)
    Officer
    icon of calendar 1997-07-21 ~ 2007-03-31
    OF - Director → CIF 0
  • 58
    Holden, Timothy Arthur
    Chartered Town Planner born in November 1959
    Individual
    Officer
    icon of calendar 2014-04-01 ~ 2016-11-23
    OF - Director → CIF 0
  • 59
    Kiernan, Peter Hartley
    Civil Servant born in December 1952
    Individual (1 offspring)
    Officer
    icon of calendar 2004-01-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 60
    Slota, Robert Emilion
    Consulting Engineer born in September 1953
    Individual
    Officer
    icon of calendar 2002-03-01 ~ 2008-07-01
    OF - Director → CIF 0
  • 61
    Wilton, David Charles
    Director born in October 1962
    Individual (2 offsprings)
    Officer
    icon of calendar 2009-02-10 ~ 2010-12-13
    OF - Director → CIF 0
  • 62
    Marshall, Paul Andrew
    Director born in March 1961
    Individual (1 offspring)
    Officer
    icon of calendar 2006-07-17 ~ 2009-03-23
    OF - Director → CIF 0
  • 63
    Morris, Clive Lee
    Engineer born in November 1953
    Individual (1 offspring)
    Officer
    icon of calendar 2002-03-01 ~ 2005-07-01
    OF - Director → CIF 0
parent relation
Company in focus

TETRA TECH LIMITED

Previous names
WYG ENGINEERING LIMITED - 2020-12-30
WHITE YOUNG GREEN CONSULTING LIMITED - 2008-07-01
WHITE YOUNG LIMITED - 1986-02-07
BROXMILL LIMITED - 1985-12-20
WHITE YOUNG CONSULTING GROUP LIMITED - 1998-01-05
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 LIMITED - 2020-12-30
    BROXMILL LIMITED - 2020-12-30
    WHITE YOUNG CONSULTING GROUP LIMITED - 2020-12-30
    Registered number 01959704
    icon of address3 Sovereign Square, Sovereign Street, Leeds LS1 4ER
    PRIVATE LIMITED COMPANY incorporated on 1985-11-15 (40 years 1 month). 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
    icon of address3 Sovereign Square, Sovereign Street, Leeds, England, LS1 4ER
    CIF 1
  • TETRA TECH LIMITED
    S
    Registered number 01959704
    icon of address3, 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
    icon of address3, 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
Active 7
  • 1
    icon of address3 Sovereign Square, Sovereign Street, Leeds, England
    Active Corporate (4 parents)
    Equity (Company account)
    4,000 GBP2024-09-30
    Officer
    icon of calendar 2019-04-17 ~ now
    CIF 1 - Secretary → ME
  • 2
    TETRA TECH PROJECTS NORTHERN IRELAND LIMITED - 2020-03-18
    icon of address1 Locksley Business Park, Montgomery Road, Belfast, Northern Ireland
    Active Corporate (6 parents, 1 offspring)
    Equity (Company account)
    1 GBP2020-09-30
    Person with significant control
    icon of calendar 2021-02-23 ~ now
    CIF 5 - Ownership of shares – 75% or more → OE
  • 3
    DAVID TRENCH & ASSOCIATES LIMITED - 1986-06-11
    TRENCH FARROW & ASSOCIATES LIMITED - 1995-09-26
    QUIZGATE LIMITED - 1979-12-31
    TRENCH FARROW & PARTNERS LIMITED - 2002-11-26
    icon of address3 Sovereign Square, Sovereign Street, Leeds, England
    Active Corporate (2 parents)
    Equity (Company account)
    10,000 GBP2022-09-30
    Person with significant control
    icon of calendar 2016-04-06 ~ now
    CIF 3 - Ownership of voting rights - 75% or more → OE
    CIF 3 - Ownership of shares – 75% or more → OE
    CIF 3 - Right to appoint or remove directors → OE
  • 4
    WHITE YOUNG GREEN IPS LIMITED - 2008-06-16
    WYG LIMITED - 2009-12-18
    EVER 2354 LIMITED - 2004-05-14
    icon of address3 Sovereign Square, Sovereign Street, Leeds, England
    Active Corporate (2 parents)
    Equity (Company account)
    2 GBP2024-09-30
    Person with significant control
    icon of calendar 2016-04-06 ~ now
    CIF 2 - Ownership of shares – 75% or more → OE
    CIF 2 - Right to appoint or remove directors → OE
    CIF 2 - Ownership of voting rights - 75% or more → OE
  • 5
    SIMCO 382 LIMITED - 1991-02-27
    icon of addressArndale Court Otley Road, Headingley, Leeds
    Dissolved Corporate (2 parents)
    Person with significant control
    icon of calendar 2016-04-06 ~ dissolved
    CIF 7 - Ownership of shares – 75% or more → OE
  • 6
    KARA TAYLOR ENGINEERS LIMITED - 1997-08-14
    ADAMS KARA TAYLOR LIMITED - 2011-03-31
    icon of addressArndale Court Otley Road, Headingley, Leeds
    Dissolved Corporate (2 parents)
    Person with significant control
    icon of calendar 2016-04-06 ~ dissolved
    CIF 8 - Ownership of shares – 75% or more → OE
  • 7
    MC52 LIMITED - 2000-03-10
    icon of addressArndale Court Otley Road, Headingley, Leeds
    Dissolved Corporate (2 parents)
    Person with significant control
    icon of calendar 2016-04-06 ~ dissolved
    CIF 6 - Ownership of shares – 75% or more → OE
Ceased 1
  • PHILIP DOWNIE AND ASSOCIATES - 1994-11-15
    PHILIP DOWNIE AND ASSOCIATES LIMITED - 2004-11-12
    icon of addressC/o A&l Goodbody Northern Ireland Llp, 42-46 Fountain Street, Belfast
    Dissolved Corporate (2 parents)
    Person with significant control
    icon of calendar 2016-04-06 ~ 2021-02-23
    CIF 4 - Ownership of shares – 75% or more → OE

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Contains public sector information retrieved at 12 November 2025 and licensed under the Open Government Licence v3.0.