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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 21
  • 1
    Gillespie, Andrew James
    Born in May 1969
    Individual (150 offsprings)
    Officer
    2019-03-21 ~ now
    OF - Director → CIF 0
  • 2
    Jenkins, John William
    Director born in April 1961
    Individual (7 offsprings)
    Officer
    2008-07-01 ~ 2009-01-01
    OF - Director → CIF 0
  • 3
    Cummins, Sean Vincent
    Director born in September 1962
    Individual (80 offsprings)
    Officer
    2011-12-05 ~ 2016-06-07
    OF - Director → CIF 0
  • 4
    Hatch, David Craig
    Born in November 1964
    Individual (9 offsprings)
    Officer
    2025-04-14 ~ now
    OF - Director → CIF 0
  • 5
    Lemmon, Richard Alan
    Born in August 1959
    Individual (60 offsprings)
    Officer
    2020-01-15 ~ now
    OF - Director → CIF 0
  • 6
    Collard, Philip David
    Director born in October 1960
    Individual (6 offsprings)
    Officer
    2008-07-01 ~ 2009-06-26
    OF - Director → CIF 0
  • 7
    Clarkson, Iain Geoffrey
    Chartered Accountant born in March 1967
    Individual (42 offsprings)
    Officer
    2016-06-07 ~ 2019-02-25
    OF - Director → CIF 0
  • 8
    Procter, Michael John
    Director born in July 1952
    Individual (4 offsprings)
    Officer
    2008-07-01 ~ 2010-06-30
    OF - Director → CIF 0
  • 9
    Whitworth, Benjamin Warwick
    Individual (98 offsprings)
    Officer
    2011-05-03 ~ 2019-10-31
    OF - Secretary → CIF 0
  • 10
    Zukowski, Elizabeth Lina
    Director born in June 1958
    Individual (2 offsprings)
    Officer
    2008-07-01 ~ 2011-03-04
    OF - Director → CIF 0
  • 11
    Murdoch, Andrew
    Individual (63 offsprings)
    Officer
    2023-10-11 ~ now
    OF - Secretary → CIF 0
  • 12
    Olver, Graham Dudley
    Director born in May 1961
    Individual (32 offsprings)
    Officer
    2009-08-03 ~ 2015-08-31
    OF - Director → CIF 0
  • 13
    Hamer, Paul Christopher
    Director born in March 1969
    Individual (27 offsprings)
    Officer
    2008-07-01 ~ 2017-06-09
    OF - Director → CIF 0
  • 14
    Hopson, Preston
    Individual (77 offsprings)
    Officer
    2020-01-07 ~ 2023-10-11
    OF - Secretary → CIF 0
  • 15
    Farbridge, Caroline Louise
    Chartered Secretary
    Individual (30 offsprings)
    Officer
    2008-11-05 ~ 2010-10-15
    OF - Secretary → CIF 0
  • 16
    Hartley, Robert
    Chartered Accountant born in March 1958
    Individual (45 offsprings)
    Officer
    2008-05-16 ~ 2009-04-14
    OF - Director → CIF 0
  • 17
    Haynes, Lawrence John
    Company Director born in December 1952
    Individual (33 offsprings)
    Officer
    2008-05-16 ~ 2009-01-06
    OF - Director → CIF 0
  • 18
    Mccormick, Douglas Alexander Drysdale
    Chief Executive Officer born in January 1962
    Individual (27 offsprings)
    Officer
    2017-06-12 ~ 2020-03-04
    OF - Director → CIF 0
  • 19
    Wilton, David Charles
    Director born in October 1962
    Individual (78 offsprings)
    Officer
    2009-02-10 ~ 2011-12-02
    OF - Director → CIF 0
  • 20
    Connery, Denis Patrick
    Company Director born in March 1957
    Individual (35 offsprings)
    Officer
    2008-05-16 ~ 2008-11-05
    OF - Director → CIF 0
    Connery, Denis Patrick
    Individual (35 offsprings)
    Officer
    2008-05-16 ~ 2008-11-05
    OF - Secretary → CIF 0
  • 21
    TETRA TECH UK CONSULTING GROUP LIMITED
    - now 01869543
    TETRA TECH UK GROUP CONSULTING LIMITED - 2020-12-17 01869543
    WYG LIMITED - 2020-12-16 01869543 05111508... (more)
    WYG PLC - 2019-07-10 01869543 05111508... (more)
    WHITE YOUNG GREEN PLC - 2009-12-18
    ERNEST GREEN AND PARTNERS HOLDINGS PLC - 1997-07-21
    3, Sovereign Square, Sovereign Street, Leeds, England
    Active Corporate (40 parents, 7 offsprings)
    Person with significant control
    2016-04-06 ~ now
    PE - Right to appoint or remove directorsCIF 0
    PE - Ownership of shares – 75% or moreCIF 0
    PE - Ownership of voting rights - 75% or moreCIF 0
parent relation
Company in focus

TETRA TECH GROUP LIMITED

Period: 2020-12-16 ~ now
Company number: 06595608
Registered names
TETRA TECH GROUP LIMITED - now
WYG GROUP LIMITED - 2020-12-16
Standard Industrial Classification
70100 - Activities Of Head Offices

Related profiles found in government register
  • TETRA TECH GROUP LIMITED
    Info
    WYG GROUP LIMITED - 2020-12-16
    Registered number 06595608
    3 Sovereign Square, Sovereign Street, Leeds LS1 4ER
    PRIVATE LIMITED COMPANY incorporated on 2008-05-16 (17 years 10 months). The company status is Active.
    The last date of confirmation statement was made at 2025-07-21
    CIF 0
  • TETRA TECH GROUP LIMITED
    S
    Registered number 06595608
    3, Sovereign Square, Sovereign Street, Leeds, England, LS1 4ER
    Limited By Shares in Companies House, United Kingdom
    CIF 1 CIF 2
    Limited Liability Company in Companies House, England
    CIF 3
child relation
Offspring entities and appointments 4
  • 1
    TETRA TECH ENVIRONMENT PLANNING TRANSPORT LIMITED
    - now 03050297
    WYG ENVIRONMENT PLANNING TRANSPORT LIMITED
    - 2020-12-16 03050297
    WHITE YOUNG GREEN ENVIRONMENTAL LIMITED - 2008-07-01
    ERNEST GREEN ENVIRONMENTAL LIMITED - 1998-01-16
    GREENBACK LIMITED - 1995-05-15
    3 Sovereign Square, Sovereign Street, Leeds, England
    Active Corporate (35 parents, 6 offsprings)
    Person with significant control
    2016-04-06 ~ now
    CIF 1 - Ownership of shares – 75% or more OE
    CIF 1 - Right to appoint or remove directors OE
    CIF 1 - Ownership of voting rights - 75% or more OE
  • 2
    TETRA TECH LIMITED
    - now 01959704
    WYG ENGINEERING LIMITED
    - 2020-12-30 01959704
    WHITE YOUNG GREEN CONSULTING LIMITED - 2008-07-01
    WHITE YOUNG CONSULTING GROUP LIMITED - 1998-01-05
    WHITE YOUNG LIMITED - 1986-02-07
    BROXMILL LIMITED - 1985-12-20
    3 Sovereign Square, Sovereign Street, Leeds, England
    Active Corporate (67 parents, 8 offsprings)
    Person with significant control
    2016-04-06 ~ now
    CIF 3 - Ownership of shares – 75% or more OE
  • 3
    TETRA TECH MANAGEMENT SERVICES LIMITED
    - now 04807864
    WYG MANAGEMENT SERVICES LIMITED
    - 2020-12-16 04807864
    TWEEDS LIMITED - 2007-08-28
    3 Sovereign Square, Sovereign Street, Leeds, England
    Active Corporate (24 parents, 2 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
  • 4
    WYG INTERNATIONAL LIMITED
    - now 03195485
    IMC CONSULTING LIMITED - 2005-07-01
    IMC ECONOMIC AND ENERGY CONSULTANTS LIMITED - 1998-05-20
    BROOMCO (1087) LIMITED - 1996-06-17
    Arndale Court Otley Road, Headingley, Leeds
    Converted / Closed Corporate (40 parents, 5 offsprings)
    Person with significant control
    2016-04-06 ~ now
    CIF 4 - Ownership of shares – 75% or more OE

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Contains public sector information retrieved at 22 March 2026 and licensed under the Open Government Licence v3.0.