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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

Mcmaster, Brian Keith

    Related profiles found in government register
  • Mcmaster, Brian Keith
    Australian born in March 1971

    Resident in Australia

    Registered addresses and corresponding companies
    • 94a, High Street, Sevenoaks, TN13 1LP, United Kingdom

      IIF 1
  • Mcmaster, Brian Keith
    Australian chief executive born in March 1971

    Resident in England

    Registered addresses and corresponding companies
    • Eastcastle House, 27-28 Eastcastle Street, London, W1W 8DH, United Kingdom

      IIF 2
  • Mcmaster, Brian Keith
    Australian company director born in March 1971

    Resident in England

    Registered addresses and corresponding companies
    • 29, Kavanaghs Road, Brentwood, CM14 4NB, England

      IIF 3
    • 71, Courtfield Gardens, London, SW5 0NJ, England

      IIF 4
  • Mcmaster, Brian Keith
    Australian born in March 1971

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • Eastcastle House, 27-28 Eastcastle Street, London, W1W 8DH, United Kingdom

      IIF 5
  • Mcmaster, Brian Keith

    Registered addresses and corresponding companies
    • 29, Kavanaghs Road, Brentwood, CM14 4NB, England

      IIF 6
  • Mr Brian Keith Mcmaster
    Australian born in March 1971

    Resident in England

    Registered addresses and corresponding companies
    • C/o Canmoor, 34 Dover Street, London, W1S 4NG, England

      IIF 7
  • Brian Keith Mcmaster
    Australian born in March 1971

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • Level 2, 34 Dover Street, London, W1S 4NG, United Kingdom

      IIF 8
child relation
Offspring entities and appointments
Active 4
  • 1
    DIONYSUS CAPITAL PLC - 2024-10-18
    382 Russell Court Woburn Place, London, England
    Active Corporate (4 parents)
    Officer
    2022-04-20 ~ now
    IIF 1 - Director → ME
  • 2
    29 Kavanaghs Road, Brentwood, England
    Dissolved Corporate (2 parents)
    Equity (Company account)
    41,790 GBP2022-02-28
    Officer
    2016-02-29 ~ dissolved
    IIF 3 - Director → ME
    2016-02-29 ~ dissolved
    IIF 6 - Secretary → ME
    Person with significant control
    2016-04-06 ~ dissolved
    IIF 7 - Ownership of voting rights - More than 25% but not more than 50%OE
    IIF 7 - Ownership of shares – More than 25% but not more than 50%OE
  • 3
    Eastcastle House, 27-28 Eastcastle Street, London, United Kingdom
    Active Corporate (5 parents, 1 offspring)
    Officer
    2015-06-30 ~ now
    IIF 5 - Director → ME
  • 4
    HARVEST MINERALS LIMITED - 2021-11-09
    Eastcastle House, 27-28 Eastcastle Street, London, United Kingdom
    Dissolved Corporate (4 parents)
    Equity (Company account)
    -117,987 GBP2022-06-30
    Officer
    2019-06-14 ~ dissolved
    IIF 2 - Director → ME
Ceased 2
  • 1
    CONTANGO HOLDINGS LIMITED - 2017-06-07
    1 Charterhouse Mews, London, England
    Active Corporate (5 parents)
    Officer
    2016-07-11 ~ 2020-06-18
    IIF 4 - Director → ME
  • 2
    Eastcastle House, 27-28 Eastcastle Street, London, United Kingdom
    Active Corporate (5 parents, 1 offspring)
    Person with significant control
    2016-04-06 ~ 2017-06-29
    IIF 8 - Ownership of voting rights - More than 25% but not more than 50% OE
    IIF 8 - Ownership of shares – 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.