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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

Castle, John Mark

    Related profiles found in government register
  • Castle, John Mark
    British born in July 1960

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • Preston Montford, Montford Bridge, Shrewsbury, Shropshire, SY4 1HW, United Kingdom

      IIF 1
  • Castle, John Mark
    British born in July 1960

    Resident in England

    Registered addresses and corresponding companies
    • 8, St Ann's Place, Haddington, East Lothian, Scotland, EH41 4BS, Scotland

      IIF 2 IIF 3
    • Central Services, Preston Montford, Shrewsbury, Shropshire, SY4 1HW

      IIF 4
    • Preston Montford, Montford Bridge, Shrewsbury, SY4 1HW, England

      IIF 5
  • Castle, John Mark
    British chief executive born in July 1960

    Resident in England

    Registered addresses and corresponding companies
    • 14 John Street, London, WC1N 2EB

      IIF 6
  • Castle, John Mark, Lt Col
    British army officer born in July 1960

    Registered addresses and corresponding companies
    • Somme Barracks, Catterick Garrison, North Yorkshire, DL9 4LD

      IIF 7 IIF 8
child relation
Offspring entities and appointments 6
  • 1
    FSC CONSULTANCY SERVICES LIMITED
    - now 02746466
    OIL POLLUTION RESEARCH UNIT LIMITED - 1996-08-14
    Central Services, Preston Montford, Shrewsbury, Shropshire
    Active Corporate (9 parents)
    Equity (Company account)
    2 GBP2024-12-31
    Officer
    2018-04-30 ~ now
    IIF 4 - Director → ME
  • 2
    FSC TRADING LTD
    12891131
    Preston Montford, Montford Bridge, Shrewsbury, Shropshire, England
    Active Corporate (8 parents)
    Equity (Company account)
    1 GBP2024-12-31
    Officer
    2020-09-21 ~ now
    IIF 1 - Director → ME
  • 3
    HIRE A CANOE LTD
    10733251
    Preston Montford, Montford Bridge, Shrewsbury, England
    Active Corporate (5 parents)
    Equity (Company account)
    20,217 GBP2024-11-29
    Officer
    2026-02-02 ~ now
    IIF 5 - Director → ME
  • 4
    THE K.O.S.B. ASSOCIATION FUNDS
    SC241125
    8 St Ann's Place, Haddington, East Lothian, Scotland, Scotland
    Active Corporate (28 parents)
    Officer
    2025-11-01 ~ now
    IIF 3 - Director → ME
    2002-12-13 ~ 2004-04-23
    IIF 8 - Director → ME
  • 5
    THE K.O.S.B. MUSEUM FUND
    SC241124
    8 St Ann's Place, Haddington, East Lothian, Scotland, Scotland
    Active Corporate (28 parents)
    Officer
    2002-12-13 ~ 2004-04-23
    IIF 7 - Director → ME
    2025-11-01 ~ now
    IIF 2 - Director → ME
  • 6
    THE SOCIETY FOR THE PROTECTION OF ANIMALS ABROAD
    - now 00558085
    SOCIETY FOR THE PROTECTION OF ANIMALS IN NORTH AFRICA(THE) - 1991-07-26
    55 Ludgate Hill, 2nd Floor, London, England
    Active Corporate (64 parents, 1 offspring)
    Officer
    2011-06-16 ~ 2019-07-01
    IIF 6 - Director → ME

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