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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

Mr John Anthony Costalas

    Related profiles found in government register
  • Mr John Anthony Costalas
    British born in June 1949

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 12, Canons Court, Stonegrove, Edgware, Middlesex, HA8 7ST

      IIF 1
    • 71-75, Shelton Street, Covent Garden, London, WC2H 9JQ

      IIF 2
    • 71-75, Shelton Street, Covent Garden, London, WC2H 9JQ, England

      IIF 3
    • 71-75, Shelton Street, London, WC2H 9JQ, United Kingdom

      IIF 4
  • John Costalas
    British born in June 1949

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • C/o Michael Laurie Magar Limited, 1 The Beacons, Hatfield, Hertfordshire, AL10 8RS, United Kingdom

      IIF 5
  • Costalas, John Anthony
    British born in June 1949

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 12, Canons Court, Stonegrove, Edgware, Middlesex, HA8 7ST, United Kingdom

      IIF 6
    • 71-75, Shelton Street, Covent Garden, London, WC2H 9JQ, United Kingdom

      IIF 7 IIF 8 IIF 9
  • Costalas, John
    British born in June 1949

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • C/o Michael Laurie Magar Limited, 1 The Beacons, Hatfield, Hertfordshire, AL10 8RS, United Kingdom

      IIF 10
  • Costalas, John Anthony
    born in June 1949

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 20-21, Junction Mews, London, W2 1PN, United Kingdom

      IIF 11
    • Marble Arch Tower, 55 Bryanston Street, London, W1H 7AA, United Kingdom

      IIF 12
  • Costalas, John

    Registered addresses and corresponding companies
    • Premiere House, Elstree Way, Borehamwood, WD6 1JH, England

      IIF 13
child relation
Offspring entities and appointments 7
  • 1
    A KNIGHT 2 LLP
    OC375891
    20-21 Junction Mews, London
    Dissolved Corporate (6 parents)
    Officer
    2012-06-08 ~ 2014-04-05
    IIF 11 - LLP Member → ME
  • 2
    ABBINGDON KNIGHT LLP
    OC369883
    128 City Road, London, England
    Active Corporate (6 parents)
    Officer
    2012-04-06 ~ 2012-06-07
    IIF 12 - LLP Member → ME
  • 3
    ACUITY PROJECTS LIMITED
    09614013
    71-75 Shelton Street, Covent Garden, London
    Active Corporate (1 parent)
    Equity (Company account)
    1 GBP2024-12-31
    Officer
    2015-05-29 ~ now
    IIF 9 - Director → ME
    Person with significant control
    2016-04-06 ~ now
    IIF 2 - Ownership of shares – 75% or more OE
  • 4
    CANONS COURT RTM COMPANY LTD
    11643467
    C/o Michael Laurie Magar Limited, 1 The Beacons, Hatfield, Hertfordshire, United Kingdom
    Active Corporate (8 parents)
    Cash at bank and in hand (Company account)
    16,280 GBP2024-03-24
    Officer
    2018-10-25 ~ now
    IIF 10 - Director → ME
    2018-10-25 ~ 2020-11-24
    IIF 13 - Secretary → ME
    Person with significant control
    2018-10-25 ~ now
    IIF 5 - Right to appoint or remove directors OE
  • 5
    ELITE EXPERTISE LIMITED
    09936115
    71-75 Shelton Street, Covent Garden, London, England
    Active Corporate (1 parent)
    Equity (Company account)
    1 GBP2025-04-30
    Officer
    2016-01-05 ~ now
    IIF 7 - Director → ME
    Person with significant control
    2016-04-06 ~ now
    IIF 3 - Ownership of shares – 75% or more OE
    IIF 3 - Ownership of voting rights - 75% or more OE
    IIF 3 - Right to appoint or remove directors OE
  • 6
    JACANASYS LIMITED
    08946067
    12 Canons Court, Stonegrove, Edgware, Middlesex
    Active Corporate (1 parent)
    Equity (Company account)
    705 GBP2024-03-31
    Officer
    2014-03-19 ~ now
    IIF 6 - Director → ME
    Person with significant control
    2016-04-06 ~ now
    IIF 1 - Ownership of shares – 75% or more OE
  • 7
    SERPICO STAR LTD
    - now 11556660
    SERPICO HOLDINGS LTD
    - 2019-10-02 11556660
    71-75 Shelton Street, Covent Garden, London, England
    Active Corporate (1 parent)
    Equity (Company account)
    1 GBP2024-12-31
    Officer
    2018-09-06 ~ now
    IIF 8 - Director → ME
    Person with significant control
    2018-09-06 ~ now
    IIF 4 - Right to appoint or remove directors OE
    IIF 4 - Ownership of voting rights - 75% or more OE
    IIF 4 - Ownership of shares – 75% or more OE

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