Tetra Tech Limited

Active01959704 Private limited company
Incorporated
15 November 1985 (40 years)
Previously known as
Wyg Engineering Limited (until 30 December 2020)
White Young Green Consulting Limited (until 1 July 2008)
White Young Consulting Group Limited (until 5 January 1998)
Earlier: White Young Limited, Broxmill Limited
Industry
Other engineering activities (71129)
Directors
David Craig Hatch
Owned by
Accounts type
Full
Region
Yorkshire
Address
3 Sovereign Square
Sovereign Street
Leeds
LS1 4ER

Filing status

Accounts due
30 June 2027
Last accounts
28 September 2025
Conf. stmt due
29 November 2026
Last conf. stmt
15 November 2025

Charges

Total
7
Outstanding
0
Part satisfied
0
Satisfied
7

Officers 3 active

Officer details are public data from the Companies House register.

Murdoch, Andrew James
Secretary · Appointed 14 April 2025
Hatch, David Craig
Director · Appointed 22 October 2020
British
Born November 1964
Director · Appointed 14 October 2010
Also at Tetra Tech UK Consulting Group Limited, Tetra Tech Environment Planning Transport Limited, Tetra Tech Environmental and Planning (Northern Ireland) Limited · more companies
British
Born May 1969 (57)
Officer history (69 former)
14 April 2025
Resigned Arber, Gareth George as Secretary
14 April 2025
Appointed Murdoch, Andrew James as Secretary
22 October 2020
Appointed Hatch, David Craig as Director
22 October 2020
Resigned Jackson, Mark Edward as Director
31 October 2019
Resigned Whitworth, Benjamin Warwick as Secretary
31 October 2019
Resigned Whitworth, Benjamin Warwick as Director
28 October 2019
Appointed Jackson, Mark Edward as Director
15 January 2018
Resigned Townend, Jeanne Carroll as Director
15 January 2018
Appointed Whitworth, Benjamin Warwick as Director
5 December 2016
Resigned Whitworth, Benjamin Warwick as Director
5 December 2016
Appointed Townend, Jeanne Carroll as Director
23 November 2016
Appointed Whitworth, Benjamin Warwick as Director
23 November 2016
Resigned Holden, Timothy Arthur as Director
1 April 2014
Appointed Holden, Timothy Arthur as Director
1 January 2014
Resigned Olver, Graham Dudley as Director
16 November 2013
Resigned Thorn, Glen as Director
21 May 2012
Resigned Lax, Noel Geoffrey as Director
15 March 2012
Resigned Allen, Richard Anthony as Director
7 March 2012
Resigned Hare, Richard Timothy as Director
5 March 2012
Appointed Thorn, Glen as Director
5 March 2012
Resigned Kershaw, David Michael as Director
3 May 2011
Appointed Whitworth, Benjamin Warwick as Secretary
13 December 2010
Resigned Wilton, David Charles as Director
13 December 2010
Resigned Hamer, Paul Christopher as Director
1 December 2010
Appointed Allen, Richard Anthony as Director
1 December 2010
Appointed Kershaw, David Michael as Director
25 November 2010
Appointed Arber, Gareth George as Secretary
1 November 2010
15 October 2010
Resigned Farbridge, Caroline Louise as Secretary
14 October 2010
Appointed Gillespie, Andrew James as Director
22 January 2010
7 December 2009
Resigned Jenkins, John William as Director
3 August 2009
Appointed Olver, Graham Dudley as Director
14 April 2009
Resigned Hartley, Robert as Director
23 March 2009
Resigned Jones, Philip David as Director
23 March 2009
Resigned Coackley, Richard James as Director
23 March 2009
Resigned Marshall, Paul Andrew as Director
10 February 2009
Appointed Wilton, David Charles as Director
5 January 2009
Resigned Haynes, Lawrence John as Director
1 January 2009
Appointed Jenkins, John William as Director
5 November 2008
Appointed Farbridge, Caroline Louise as Secretary
5 November 2008
Resigned Connery, Denis Patrick as Director
5 November 2008
Resigned Connery, Denis Patrick as Secretary
1 July 2008
Resigned Dodds, Andrew as Director
1 July 2008
Resigned Everall, Terry Richard as Director
1 July 2008
Resigned Slota, Robert Emilion as Director
1 July 2008
1 July 2008
Resigned Procter, Michael John as Director
1 July 2008
Resigned Addison, Keith Robert as Director
1 July 2008
Appointed Hamer, Paul Christopher as Director
1 July 2008
Resigned Fuller, Richard Anthony as Director
1 July 2008
Resigned Ford, Douglas Moncrieff as Director
1 July 2008
Resigned Martin, Simon as Director
1 July 2008
Resigned Whittaker, John David as Director
1 July 2008
Resigned Kiernan, Peter Hartley as Director
1 July 2008
Resigned Adams, Robin William as Director
1 July 2008
Resigned Kara, Hanif Mohamed, Professor as Director
1 July 2008
Resigned Dean, Michael John as Director
1 July 2008
Resigned Zukowski, Elizabeth Lina as Director
1 July 2008
Resigned Scott, James Alexander as Director
1 July 2008
Resigned Rogers, Jonathan Grant as Director
1 July 2008
Resigned Jenkins, John William as Director
21 May 2008
Resigned Deasy, John Vincent as Director
24 January 2008
Resigned Mccaffrey, Richard George, Mr. as Director
6 November 2007
Resigned Anderson, Clive Drummond as Director
6 November 2007
Resigned Ellingworth, Andrew as Director
17 September 2007
Resigned Purvis, John George as Director
31 July 2007
Resigned Ellyatt, David Paul as Director
18 June 2007
Appointed Haynes, Lawrence John as Director
31 March 2007
Resigned Taylor, Michael Leonard as Director
28 February 2007
Resigned Thomson, Neil as Director
10 November 2006
Appointed Kara, Hanif Mohamed, Professor as Director
10 November 2006
10 November 2006
Appointed Adams, Robin William as Director
31 October 2006
Resigned Whitwell, Michael John as Director
30 October 2006
Appointed Lax, Noel Geoffrey as Director
10 August 2006
Resigned Taylor, David Charles as Director
17 July 2006
Appointed Marshall, Paul Andrew as Director
1 July 2006
Appointed Fuller, Richard Anthony as Director
1 July 2006
Appointed Martin, Simon as Director
1 July 2006
Appointed Connery, Denis Patrick as Secretary
1 July 2006
Resigned Hartley, Robert as Secretary
1 July 2006
Appointed Coackley, Richard James as Director
1 July 2006
Appointed Ellingworth, Andrew as Director
1 July 2006
Resigned Winter, Sidney Keith, Dr as Director
25 July 2005
Appointed Zukowski, Elizabeth Lina as Director
1 July 2005
Resigned Morris, Clive Lee as Director
1 January 2005
Appointed Rogers, Jonathan Grant as Director
1 December 2004
Resigned Wilson, Terence Benson as Director
1 July 2004
Appointed Scott, James Alexander as Director
1 July 2004
Appointed Jones, Philip David as Director
1 July 2004
Appointed Dodds, Andrew as Director
1 July 2004
Appointed Thomson, Neil as Director
1 July 2004
Resigned Archibald, Kenneth Nisbet as Director
1 July 2004
Appointed Taylor, David Charles as Director
1 January 2004
Appointed Whittaker, John David as Director
1 January 2004
Appointed Kiernan, Peter Hartley as Director
1 January 2004
Appointed Connery, Denis Patrick as Director
1 January 2004
Resigned Downie, Philip Charles George as Director
17 December 2003
Resigned Brayson, William Richard as Director
1 July 2003
Appointed Anderson, Clive Drummond as Director
1 March 2003
Appointed Hare, Richard Timothy as Director
1 July 2002
Appointed Deasy, John Vincent as Director
1 July 2002
Appointed Addison, Keith Robert as Director
1 July 2002
30 April 2002
Resigned Higgs, Alan John as Director
1 March 2002
Appointed Morris, Clive Lee as Director
1 March 2002
Appointed Slota, Robert Emilion as Director
1 July 2001
Appointed Jenkins, John William as Director
3 July 2000
Appointed Mccaffrey, Richard George, Mr. as Director
4 January 2000
Appointed Procter, Michael John as Director
4 January 2000
Resigned Rivett, John Martin as Director
6 October 1999
Appointed Wilson, Terence Benson as Director
6 October 1999
Appointed Butler, Barrington Jeffrey Kerwin as Director
4 May 1999
Appointed Hartley, Robert as Director
4 May 1999
Resigned Hagues, Ian James as Secretary
4 May 1999
Appointed Hartley, Robert as Secretary
4 May 1999
Resigned Hagues, Ian James as Director
1 April 1999
Appointed Downie, Philip Charles George as Director
30 June 1998
Resigned Kippax, Alan as Director
12 May 1998
Appointed Archibald, Kenneth Nisbet as Director
1 January 1998
Appointed Ford, Douglas Moncrieff as Director
1 January 1998
Appointed Everall, Terry Richard as Director
21 July 1997
Appointed Taylor, Michael Leonard as Director
21 July 1997
Appointed Whitwell, Michael John as Director
21 July 1997
Appointed Dean, Michael John as Director
21 July 1997
Appointed Rivett, John Martin as Director
18 July 1997
Appointed Hagues, Ian James as Secretary
18 July 1997
Appointed Hagues, Ian James as Director
18 July 1997
Resigned Hall, Lawrence Derek as Secretary
31 December 1996
Resigned Walsh, Terence Geoffrey as Director
30 June 1993
Appointed Walsh, Terence Geoffrey as Director
31 December 1992
Resigned Whiting, Walter Leonard as Director
15 December 1992
Appointed Purvis, John George as Director
15 December 1992
Appointed Ellyatt, David Paul as Director
15 December 1992
Appointed Winter, Sidney Keith, Dr as Director

Ownership 1 active

People and entities with significant control, from the Companies House PSC register

Corporate entity · Notified 6 April 2016
Owns 75–100% of shares
Limited Liability Company
Reg. no. 06595608

Holdings 6

Companies where Tetra Tech Limited is registered as a person with significant control

Owns 25–50% of shares
Active
Owns 25–50% of shares
Active
Owns 25–50% of shares
Active
Owns 75–100% of shares
Active
Owns 75–100% of shares
Active
Owns 75–100% of shares
Status not confirmed

Group structure 31 shown

Ownership group derived from the Companies House PSC register

Tetra Tech UK Holdings Limited
R P S Group Limited Owns 75–100% of shares
Ecl Group Limited Owns 75–100% of shares
Exploration Consultants Limited Owns 75–100% of shares
RPS Trustees Limited Status not confirmedOwns 75–100% of shares
Tetra Tech Consulting Limited Owns 75–100% of shares
RPS Consultants Limited Status not confirmedOwns 75–100% of shares
RPS Ireland Limited Owns 75–100% of shares
Tetra Tech Occupational Health Limited Owns 75–100% of shares
Tetra Tech Environmental Management Limited Owns 75–100% of shares
Tetra Tech RPS Energy Consultants Limited Owns 75–100% of shares
Tetra Tech RPS Energy Limited Owns 75–100% of shares
Nautilus Limited In liquidationOwns 75–100% of shares
Reservoir Imaging Limited Status not confirmedOwns 75–100% of shares
Tetra Tech Europe Executive Services Limited Owns 75–100% of shares
Tetra Tech UK Consulting Group Limited Owns 75–100% of shares
Tetra Tech Group Limited Owns 75–100% of shares
Tetra Tech Environment Planning Transport Limited Owns 75–100% of shares
Tetra Tech Limited This company Owns 75–100% of shares
Tetra Tech Management Services Limited Owns 75–100% of shares
White Young Green International Limited Status not confirmedOwns 75–100% of shares
Wyg Consulting Limited Status not confirmedOwns 75–100% of shares
Tetra Tech UK Limited Owns 75–100% of shares
Coffey Geotechnics Limited Owns 75–100% of shares
Hoare Lea LLP Holds 75–100% of voting rights
Hoare Lea Holdings Limited Owns 75–100% of shares
Ndy Consulting Limited Owns 75–100% of shares
Piteau Associates UK Limited Owns 75–100% of shares
Tetra Tech International Development Europe Limited Owns 75–100% of shares
Tetra Tech International Development Limited Owns 75–100% of shares
Tetra Tech International Development Projects Limited Owns 75–100% of shares

What Tetra Tech say about themselves

“We are improving the quality of life for people around the world through science, technology, and innovation.”

— from tetratech.com

Filings

Recent filings only. See the full history on Companies House

DateDescriptionMade Up ToPagesPDF
6 July 2026Full accounts28 September 2025
14 May 2026Satisfaction of a charge in full
21 November 2025Confirmation statement with no updates15 November 2025
1 July 2025Full accounts29 September 2024
15 April 2025Termination of appointment of a secretary
Show all recent filings

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