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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

Dr Hayaatun Sillem

    Related profiles found in government register
  • Dr Hayaatun Sillem
    British born in April 1976

    Resident in England

    Registered addresses and corresponding companies
    • 167-169, Great Portland Street, Fifth Floor, London, W1W 5PF, England

      IIF 1
    • Fifth Floor, 167-169 Great Portland Street, London, W1W 5PF, England

      IIF 2
  • Sillem, Hayaatun, Dr
    British born in April 1976

    Resident in England

    Registered addresses and corresponding companies
    • 167-169, Great Portland Street, Fifth Floor, London, W1W 5PF, England

      IIF 3
    • 81, Rivington Street, London, EC2A 3AY, England

      IIF 4
    • C/o The Royal Academy Of Engineering, 3 Carlton House Terrace, London, SW1Y 5DG

      IIF 5
    • Fifth Floor, 167-169 Great Portland Street, London, W1W 5PF, England

      IIF 6
    • Northern & Shell Building, 5th Floor, 10 Lower Thames Street, London, EC3R 6EN, England

      IIF 7
  • Sillem, Hayaatun, Dr
    British ceo born in April 1976

    Resident in England

    Registered addresses and corresponding companies
    • Pricewaterhousecoopers Llp, One Chamberlain Square, Birmingham, B3 3AX

      IIF 8
  • Sillem, Hayaatun, Dr
    British chief executive born in April 1976

    Resident in England

    Registered addresses and corresponding companies
    • 3, Carlton House Terrace, London, SW1Y 5DG, England

      IIF 9
  • Sillem, Hayaatun, Dr
    British director born in April 1976

    Resident in England

    Registered addresses and corresponding companies
    • Unit 2, The Orient Centre, Greycaine Road, Watford, WD24 7GP

      IIF 10
  • Sillem, Hayaatun, Dr
    British deputy chief executive born in April 1976

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 5, Endeavour Square, London, E20 1JN, United Kingdom

      IIF 11
child relation
Offspring entities and appointments
Active 6
  • 1
    167-169 Great Portland Street, Fifth Floor, London, England
    Active Corporate (2 parents)
    Officer
    2025-09-21 ~ now
    IIF 3 - Director → ME
    Person with significant control
    2025-09-21 ~ now
    IIF 1 - Ownership of shares – 75% or moreOE
    IIF 1 - Right to appoint or remove directorsOE
    IIF 1 - Ownership of voting rights - 75% or moreOE
  • 2
    Pricewaterhousecoopers Llp, One Chamberlain Square, Birmingham
    Dissolved Corporate (11 parents)
    Officer
    2020-09-01 ~ dissolved
    IIF 8 - Director → ME
  • 3
    Fifth Floor, 167-169 Great Portland Street, London, England
    Active Corporate (2 parents)
    Officer
    2025-12-13 ~ now
    IIF 6 - Director → ME
    Person with significant control
    2025-12-13 ~ now
    IIF 2 - Ownership of shares – More than 25% but not more than 50%OE
    IIF 2 - Right to appoint or remove directorsOE
    IIF 2 - Ownership of voting rights - More than 25% but not more than 50%OE
  • 4
    22 Greencoat Place, London, England
    Converted / Closed Corporate (11 parents)
    Equity (Company account)
    559,126 GBP2021-12-31
    Officer
    2019-07-23 ~ now
    IIF 9 - Director → ME
  • 5
    81 Rivington Street, London, England
    Active Corporate (12 parents)
    Officer
    2022-01-04 ~ now
    IIF 4 - Director → ME
  • 6
    C/o The Royal Academy Of Engineering, 3 Carlton House Terrace, London
    Active Corporate (6 parents)
    Equity (Company account)
    100 GBP2024-03-31
    Officer
    2018-01-25 ~ now
    IIF 5 - Director → ME
Ceased 3
  • 1
    ENGINUITY
    - now
    SCIENCE, ENGINEERING AND MANUFACTURING TECHNOLOGIES ALLIANCE - 2021-01-28
    ENGINEERING AND MARINE TRAINING AUTHORITY - 2003-04-11
    ENGINEERING TRAINING AUTHORITY - 1996-11-04
    WATFORD TRAINING LIMITED - 1989-12-21
    Lytchett House, 13 Freeland Park, Wareham Road, Poole, Dorset, England
    Active Corporate (15 parents, 2 offsprings)
    Officer
    2016-06-23 ~ 2018-02-02
    IIF 10 - Director → ME
  • 2
    5 Endeavour Square, London, United Kingdom
    Active Corporate (16 parents, 1 offspring)
    Officer
    2017-03-05 ~ 2020-03-05
    IIF 11 - Director → ME
  • 3
    Northern & Shell Building, 5th Floor, 10 Lower Thames Street, London, England
    Active Corporate (16 parents)
    Officer
    2018-01-01 ~ 2025-12-31
    IIF 7 - Director → ME

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