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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

Platt, James Derrick

    Related profiles found in government register
  • Platt, James Derrick
    British born in August 1971

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 128, City Road, London, EC1V 2NX, United Kingdom

      IIF 1
  • Platt, James Derrick
    British company director born in August 1971

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • The Aon Centre, The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN

      IIF 2
    • The Aon Centre The Leadenhall Building, 122 Leadenhall Street, London, EC3V 4AN, United Kingdom

      IIF 3
  • Platt, James Derrick
    British born in August 1971

    Resident in England

    Registered addresses and corresponding companies
    • Suite 203, Bedford Heights, Brickhill Drive, Bedford, Bedfordshire, MK41 7PH, England

      IIF 4
    • Swan House, 33 Queen Street, London, EC4R 1AP, England

      IIF 5
  • Mr James Derrick Platt
    British born in August 1971

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 128, City Road, London, EC1V 2NX, United Kingdom

      IIF 6
  • Platt, James Derrick
    born in August 1971

    Resident in England

    Registered addresses and corresponding companies
    • 33, Queen Street, London, EC4R 1AP, England

      IIF 7
  • Mr James Derrick Platt
    British born in August 1971

    Resident in England

    Registered addresses and corresponding companies
    • 33, Queen Street, London, EC4R 1AP, England

      IIF 8
child relation
Offspring entities and appointments 6
  • 1
    AON GLOBAL OPERATIONS PLC
    - now 08114746 SE000141
    AON GLOBAL OPERATIONS LIMITED - 2018-03-27 SE000141
    The Aon Centre The Leadenhall Building, 122 Leadenhall Street, London
    Converted / Closed Corporate (14 parents)
    Officer
    2018-04-24 ~ now
    IIF 2 - Director → ME
  • 2
    AON GLOBAL OPERATIONS SE
    SE000141 08114746, 08114746
    The Aon Centre The Leadenhall Building, 122 Leadenhall Street, London, United Kingdom
    Converted / Closed Corporate (6 parents)
    Officer
    2020-07-23 ~ now
    IIF 3 - Member of an Administrative Organ → ME
  • 3
    NETCALL PLC
    - now 01812912 01888629
    ACKRILL CARR PLC - 1996-03-29
    Suite 203, Bedford Heights Brickhill Drive, Bedford, Bedfordshire, England
    Active Corporate (28 parents, 12 offsprings)
    Officer
    2024-10-24 ~ now
    IIF 4 - Director → ME
  • 4
    TRIMSTONE LTD
    16931523
    Swan House, 33 Queen Street, London, England
    Active Corporate (3 parents)
    Officer
    2025-12-24 ~ now
    IIF 5 - Director → ME
  • 5
    TRIMSTONE PARTNERS LTD
    15212506
    33 Queen Street, London, England
    Active Corporate (3 parents, 2 offsprings)
    Equity (Company account)
    -1,269.69 GBP2024-10-31
    Officer
    2023-10-16 ~ now
    IIF 1 - Director → ME
    Person with significant control
    2023-10-16 ~ now
    IIF 6 - Ownership of voting rights - More than 25% but not more than 50% OE
    IIF 6 - Ownership of shares – More than 25% but not more than 50% OE
  • 6
    TRIMSTONE PARTNERSHIP LLP
    OC452118
    33 Queen Street, London, England
    Active Corporate (4 parents)
    Officer
    2024-04-29 ~ now
    IIF 7 - LLP Designated Member → ME
    Person with significant control
    2024-04-29 ~ now
    IIF 8 - Right to surplus assets - More than 25% but not more than 50% OE
    IIF 8 - Ownership of voting rights - More than 25% but not more than 50% OE

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