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The above diagram shows the color scheme of the layout in the main result page. The parent entities and officers who have significant controls over the individuals in focus are always inapplicable. The offspring entities and appointments are those entities that the individuals 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
Inapplicable
parent relation
Individuals in focus

Whittaker, Sian

    Related profiles found in government register
  • Whittaker, Sian
    British born in February 1981

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 5, Bedwell Park, Stevenage, Hertfordshire, SG1 1NB

      IIF 1
  • Whittaker, Sian
    British commercial & operations director born in February 1981

    Resident in United Kingdom

    Registered addresses and corresponding companies
  • Whittaker, Sian
    British director born in February 1981

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • Manning House, Carlisle Place, London, SW1P 1JA, England

      IIF 17
  • Whittaker, Sian
    born in February 1981

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 80, Fenchurch Street, London, EC3M 4BY, United Kingdom

      IIF 18
child relation
Offspring entities and appointments 18
  • 1
    ARCADIS (BAC) LIMITED
    - now 07803869
    EC HARRIS (BAC) LIMITED - 2015-09-18
    ARCADIS UK (CM) LTD - 2011-11-23
    80 Fenchurch Street, London, United Kingdom
    Active Corporate (24 parents, 3 offsprings)
    Officer
    2022-12-01 ~ 2024-09-06
    IIF 7 - Director → ME
  • 2
    ARCADIS (UK) LIMITED
    - now 01093549 05013681, 05607007
    EC HARRIS (UK) LIMITED - 2015-09-18
    ARCADIS (UK) LIMITED - 2013-01-02
    ARCADIS AYH PLC - 2009-12-11
    ARCADIS (UK) PUBLIC LIMITED COMPANY - 2009-12-11
    AYH PLC - 2008-03-26
    AYH PARTNERSHIP LIMITED - 1999-07-01
    A.Y.H. PARTNERSHIP LIMITED - 1994-02-23
    A.Y.H. MANAGEMENT LIMITED - 1985-07-10
    FANSHAW MANAGEMENT LIMITED - 1980-12-31
    PURSCOPE LIMITED - 1976-12-31
    80 Fenchurch Street, London, United Kingdom
    Active Corporate (60 parents, 3 offsprings)
    Officer
    2022-12-01 ~ 2024-09-06
    IIF 11 - Director → ME
  • 3
    ARCADIS CONSULTING (UK) LIMITED
    - now 02212959
    HYDER CONSULTING (UK) LIMITED - 2015-09-18
    HYDER CONSULTING LIMITED - 2002-10-22
    ACER CONSULTANTS LIMITED - 1996-07-08
    THREE HUNDRED AND NINETY-NINTH SHELF TRADING COMPANY LIMITED - 1988-04-06
    80 Fenchurch Street, London, United Kingdom
    Active Corporate (82 parents, 6 offsprings)
    Officer
    2022-12-01 ~ 2024-09-06
    IIF 16 - Director → ME
  • 4
    ARCADIS CONSULTING AUSTRALIA HOLDINGS LIMITED
    09818546
    80 Fenchurch Street, London, United Kingdom
    Active Corporate (18 parents)
    Officer
    2022-12-01 ~ 2024-09-06
    IIF 12 - Director → ME
  • 5
    ARCADIS CONSULTING EUROPE LIMITED
    - now 02273559 02115472
    HYDER CONSULTING EUROPE LIMITED - 2015-09-18
    HYDER CONSULTING EUROPE AND MIDDLE EAST LIMITED - 2001-10-30
    WALLACE EVANS LIMITED - 2001-09-28
    80 Fenchurch Street, London, United Kingdom
    Active Corporate (41 parents, 1 offspring)
    Officer
    2022-12-01 ~ 2024-09-06
    IIF 14 - Director → ME
  • 6
    ARCADIS CONSULTING GROUP LIMITED
    - now 02115472 02273559
    HYDER CONSULTING GROUP LIMITED - 2015-09-18
    HYDER INFRASTRUCTURE DEVELOPMENTS LIMITED - 1998-03-31
    ACER GROUP LIMITED - 1996-07-08
    ACER CONSULTANTS LIMITED - 1988-03-25
    STUNTREVERSE LIMITED - 1987-12-16
    80 Fenchurch Street, London, United Kingdom
    Active Corporate (52 parents, 2 offsprings)
    Officer
    2022-12-01 ~ 2024-09-06
    IIF 6 - Director → ME
  • 7
    ARCADIS CONSULTING HOLDINGS LIMITED
    - now 04052317
    HYDER CONSULTING HOLDINGS LIMITED - 2015-09-18
    INGLEBY (1348) LIMITED - 2001-04-09
    80 Fenchurch Street, London, United Kingdom
    Active Corporate (30 parents, 3 offsprings)
    Officer
    2022-12-01 ~ 2024-09-06
    IIF 3 - Director → ME
  • 8
    ARCADIS GROUP LIMITED
    - now 02950545
    EC HARRIS GROUP LIMITED - 2015-09-18
    AUGURSHIP 42 LIMITED - 1994-12-13
    80 Fenchurch Street, London, United Kingdom
    Active Corporate (35 parents, 7 offsprings)
    Officer
    2022-12-01 ~ 2024-09-06
    IIF 5 - Director → ME
  • 9
    ARCADIS HUMAN RESOURCES LIMITED
    - now 03021358
    EC HARRIS HUMAN RESOURCES LIMITED - 2015-09-18
    AUGURSHIP 51 LIMITED - 1995-04-06
    80 Fenchurch Street, London, United Kingdom
    Active Corporate (35 parents)
    Officer
    2022-12-01 ~ 2024-09-06
    IIF 10 - Director → ME
  • 10
    ARCADIS INTERNATIONAL HOLDINGS LIMITED
    - now 02824756
    EC HARRIS HOLDINGS LIMITED - 2015-09-18
    EC HARRIS LTD. - 2003-07-02
    THE ACCESS AUDIT COMPANY LIMITED - 2003-05-01
    80 Fenchurch Street, London, United Kingdom
    Active Corporate (36 parents, 3 offsprings)
    Officer
    2022-12-01 ~ 2024-09-06
    IIF 8 - Director → ME
  • 11
    ARCADIS LLP
    - now OC368843 00775541
    EC HARRIS LLP - 2015-09-18
    NOILLIB LLP - 2011-11-09
    80 Fenchurch Street, London, United Kingdom
    Active Corporate (354 parents)
    Officer
    2017-04-06 ~ 2023-12-31
    IIF 18 - LLP Designated Member → ME
  • 12
    ARCADIS UK (HOLDINGS) LIMITED
    - now 05607007
    EC HARRIS UK (HOLDINGS) LIMITED - 2015-09-18
    ARCADIS UK (HOLDINGS) LIMITED - 2013-01-08
    ARCADIS UK LIMITED - 2009-12-11
    TRUSHELFCO (NO.3183) LIMITED - 2005-12-16
    80 Fenchurch Street, London, United Kingdom
    Active Corporate (37 parents, 11 offsprings)
    Officer
    2022-12-01 ~ 2024-09-06
    IIF 4 - Director → ME
  • 13
    HOME-START HERTFORDSHIRE
    08301552
    5 Bedwell Park, Stevenage, Hertfordshire
    Active Corporate (42 parents)
    Total Assets Less Current Liabilities (Company account)
    141,113 GBP2016-03-31
    Officer
    2021-12-16 ~ 2025-11-28
    IIF 1 - Director → ME
  • 14
    HYDER CONSULTING GROUP HOLDINGS LIMITED
    - now 00768087 02115472, 02273559
    HYDER CONSULTING PLC - 2015-08-21
    HYDER CONSULTING GROUP HOLDINGS PLC - 2015-08-21
    FIRTH HOLDINGS PLC - 2002-10-22
    G M FIRTH (HOLDINGS) P L C - 1995-09-22
    G.M.FIRTH (METALS) LIMITED - 1981-12-31
    80 Fenchurch Street, London, United Kingdom
    Active Corporate (44 parents, 1 offspring)
    Officer
    2022-12-01 ~ 2024-09-06
    IIF 2 - Director → ME
  • 15
    HYDER CONSULTING OVERSEAS HOLDINGS LIMITED
    04723408 03745578
    80 Fenchurch Street, London, United Kingdom
    Active Corporate (27 parents, 1 offspring)
    Officer
    2022-12-01 ~ 2024-09-06
    IIF 9 - Director → ME
  • 16
    JACKSONHYDER LIMITED
    08552914
    30 White House Road, Ipswich, Suffolk
    Active Corporate (12 parents)
    Current Assets (Company account)
    1,133,690 GBP2024-12-31
    Officer
    2020-04-15 ~ 2025-05-30
    IIF 17 - Director → ME
  • 17
    ULTRA EVC LIMITED
    - now 03021356
    ARCADIS ULTRA EVC LIMITED - 2019-11-25
    ULTRA EVC LIMITED - 2019-10-18
    ARCADIS SOLUTIONS LIMITED - 2019-10-10
    EC HARRIS SOLUTIONS LIMITED - 2015-09-18
    EC HARRIS TOTAL SOLUTIONS LIMITED - 2002-03-18
    E C HARRIS CONSTRUCTION MANAGEMENT LIMITED - 2002-03-11
    AUGURSHIP 52 LIMITED - 1995-05-17
    80 Fenchurch Street, London, United Kingdom
    Active Corporate (47 parents)
    Officer
    2022-12-01 ~ 2024-09-06
    IIF 13 - Director → ME
  • 18
    WPD TRADEMARKS LIMITED
    05667666
    80 Fenchurch Street, London, United Kingdom
    Active Corporate (25 parents)
    Officer
    2022-12-01 ~ 2024-09-06
    IIF 15 - Director → ME

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