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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.

Jump to: Offsprings
Parent entities and officers
Inapplicable
parent relation
Individuals in focus

Mrs Joan Margaret Chum

    Related profiles found in government register
  • Mrs Joan Margaret Chum
    British born in March 1948

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 5, Osward, Croydon, CR0 9HA, United Kingdom

      IIF 1
  • Chum, Joan Margaret
    British directory/administrator born in March 1948

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 5 Osward, Courtwood Lane, Croydon, Surrey, CR0 9HA

      IIF 2
  • Chum, Joan Margaret
    British medical secretary born in March 1948

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 5 Osward, Courtwood Lane, Croydon, Surrey, CR0 9HA

      IIF 3
child relation
Offspring entities and appointments 3
  • 1
    CYBER ELECTRONICS CO. LIMITED
    01453249
    257b Croydon Road, Beckenham, Kent
    Dissolved Corporate (4 parents)
    Officer
    (before 1990-12-31) ~ dissolved
    IIF 3 - Director → ME
  • 2
    FOCUS RESEARCH LIMITED
    02788888
    Unit 3 Broadfield Close, Progress Way, Croydon
    Dissolved Corporate (6 parents)
    Officer
    1993-02-11 ~ dissolved
    IIF 2 - Director → ME
  • 3
    SONAUDIA LTD.
    10817623
    5 Osward, Croydon, United Kingdom
    Dissolved Corporate (3 parents)
    Person with significant control
    2017-06-14 ~ dissolved
    IIF 1 - Ownership of shares – More than 25% but not more than 50% OE
    IIF 1 - Ownership of voting rights - More than 25% but not more than 50% OE

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