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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

Mccallum, Heather

child relation
Offspring entities and appointments
Active 0
  • Not found in our database.
Ceased 17
  • 1
    A&O (LEGAL ADVISERS) LIMITED - 2024-05-01
    One Bishops Square, London
    Active Corporate (4 parents, 1 offspring)
    Equity (Company account)
    1 GBP2020-04-30
    Officer
    2011-11-25 ~ 2014-01-08
    IIF 15 - Secretary → ME
  • 2
    One, Bishops Square, London
    Active Corporate (3 parents)
    Officer
    2003-07-31 ~ 2014-01-08
    IIF 4 - Secretary → ME
  • 3
    ALLEN OVERY SHEARMAN STERLING LIMITED - 2024-04-30
    ALLEN & OVERY (LONDON) LIMITED - 2024-04-17
    ALLEN & OVERY - 2004-01-30
    One, Bishops Square, London
    Active Corporate (3 parents)
    Equity (Company account)
    2 GBP2020-04-30
    Officer
    2003-07-31 ~ 2014-01-08
    IIF 11 - Secretary → ME
  • 4
    One Bishops Square, London
    Dissolved Corporate (2 parents)
    Officer
    2010-12-09 ~ 2014-01-08
    IIF 13 - Secretary → ME
  • 5
    One, Bishops Square, London
    Dissolved Corporate (2 parents)
    Officer
    2003-07-31 ~ 2014-01-08
    IIF 5 - Secretary → ME
  • 6
    One, Bishops Square, London
    Dissolved Corporate (2 parents)
    Officer
    2005-05-16 ~ 2014-01-08
    IIF 12 - Secretary → ME
  • 7
    ALLEN & OVERY (HOLDINGS) LIMITED - 2024-05-01
    ALLEN & OVERY (ASIA) LIMITED - 2011-02-09
    One Bishops Square, London
    Active Corporate (4 parents, 4 offsprings)
    Officer
    2010-12-09 ~ 2014-01-08
    IIF 17 - Secretary → ME
  • 8
    ALLEN & OVERY (LEGAL ADVISERS) LIMITED - 2024-05-01
    A & O (LEGAL ADVISERS) LIMITED - 2011-11-23
    One, Bishops Square, London
    Active Corporate (4 parents, 1 offspring)
    Officer
    2003-07-31 ~ 2014-01-08
    IIF 10 - Secretary → ME
  • 9
    ALLEN & OVERY (SSF) LIMITED - 2024-05-01
    One Bishops Square, London
    Active Corporate (4 parents)
    Officer
    2010-12-09 ~ 2014-01-08
    IIF 14 - Secretary → ME
  • 10
    ALLEN & OVERY PENSION TRUSTEE LIMITED - 2024-05-01
    One, Bishops Square, London
    Active Corporate (6 parents)
    Officer
    2003-07-31 ~ 2014-01-08
    IIF 8 - Secretary → ME
  • 11
    ALLEN & OVERY SERVICE COMPANY LIMITED - 2024-05-01
    ALLEN & OVERY - 1994-01-11
    One, Bishops Square, London
    Active Corporate (4 parents)
    Officer
    2003-07-31 ~ 2014-01-08
    IIF 7 - Secretary → ME
  • 12
    One, Bishops Square, London
    Dissolved Corporate (3 parents, 77 offsprings)
    Equity (Company account)
    2 GBP2020-04-30
    Officer
    2003-07-31 ~ 2014-01-08
    IIF 3 - Secretary → ME
  • 13
    One, Bishops Square, London
    Dissolved Corporate (3 parents, 75 offsprings)
    Equity (Company account)
    2 GBP2020-04-30
    Officer
    2003-07-31 ~ 2014-01-08
    IIF 2 - Secretary → ME
  • 14
    One, Bishops Square, London
    Dissolved Corporate (2 parents)
    Officer
    2005-05-16 ~ 2014-01-08
    IIF 6 - Secretary → ME
  • 15
    ALNERY NO. 1924 LIMITED - 1999-12-22
    One, Bishops Square, London
    Dissolved Corporate (4 parents)
    Equity (Company account)
    1 GBP2020-04-30
    Officer
    2003-07-31 ~ 2014-01-08
    IIF 1 - Secretary → ME
  • 16
    ALLEN & OVERY (ASIA) LIMITED - 2020-02-26
    ALLEN & OVERY (HOLDINGS) LIMITED - 2011-02-09
    One Bishops Square, London
    Active Corporate (4 parents, 1 offspring)
    Officer
    2010-12-09 ~ 2014-01-08
    IIF 16 - Secretary → ME
  • 17
    One, Bishops Square, London
    Dissolved Corporate (2 parents)
    Officer
    2005-05-16 ~ 2014-01-08
    IIF 9 - Secretary → ME

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