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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

Ritson, Mark

    Related profiles found in government register
  • Ritson, Mark
    British born in February 1967

    Resident in England

    Registered addresses and corresponding companies
    • Anthony Nolan, 2 Heathgate Place, 75-87 Agincourt Road, London, NW3 2NU, England

      IIF 1
    • 26 Crimicar Lane, Sheffield, S10 4FB, United Kingdom

      IIF 2
    • 26 Crimicar Lane, Sheffield, South Yorkshire, S10 4FB, United Kingdom

      IIF 3
  • Ritson, Mark
    British engineer born in February 1967

    Resident in England

    Registered addresses and corresponding companies
    • 26, Crimicar Lane, Sheffield, S10 4FB, England

      IIF 4
    • The Ironworks, Unit 7, Norfolk Bridge Business Park, Foley Street, Sheffield, S4 7YW, England

      IIF 5
  • Ritson, Mark
    British director born in February 1967

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 4, Bradley Street, Sheffield, South Yorkshire, S10 1PB, United Kingdom

      IIF 6
  • Ritson, Mark
    British engineer

    Registered addresses and corresponding companies
    • 26, Crimicar Lane, Sheffield, S10 4FB, England

      IIF 7
    • 4 Bradley Street, Crookes, Sheffield, S10 1PB

      IIF 8
  • Mr Mark Ritson
    British born in February 1967

    Resident in England

    Registered addresses and corresponding companies
    • 26, Crimicar Lane, Sheffield, S10 4FB, England

      IIF 9
    • 26 Crimicar Lane, Sheffield, S10 4FB, United Kingdom

      IIF 10
    • The Ironworks, Unit 7, Norfolk Bridge Business Park, Foley Street, Sheffield, S4 7YW, England

      IIF 11
    • Tue Ironworks, Unit 7, Norfolk Bridge Business Park, Foley Street, Sheffield, South Yorkshire, S4 7YW

      IIF 12
child relation
Offspring entities and appointments
Active 4
  • 1
    THE ANTHONY NOLAN TRUST - 2013-02-18
    THE ANTHONY NOLAN BONE MARROW TRUST - 2001-11-13
    THE ANTHONY NOLAN BONE MARROW TRUST LIMITED - 1990-07-19
    SPHERECAUSE LIMITED - 1990-02-19
    The Royal Free Hospital, Pond Street, Hampstead, London
    Active Corporate (12 parents, 1 offspring)
    Officer
    2019-01-24 ~ now
    IIF 1 - Director → ME
  • 2
    First Floor Unit 4, Broadfield Court, Sheffield, South Yorkshire, United Kingdom
    Active Corporate (8 parents)
    Equity (Company account)
    273,425 GBP2024-12-31
    Officer
    2016-06-13 ~ now
    IIF 3 - Director → ME
  • 3
    The Ironworks Unit 7 Norfolk Bridge Business Park, Foley Street, Sheffield, South Yorkshire
    Dissolved Corporate (3 parents)
    Equity (Company account)
    1 GBP2021-03-31
    Officer
    2004-10-18 ~ dissolved
    IIF 4 - Director → ME
    2004-10-18 ~ dissolved
    IIF 7 - Secretary → ME
  • 4
    The Ironworks Unit 7 Norfolk Bridge Business Park, Foley Street, Sheffield, South Yorkshire
    Active Corporate (2 parents)
    Equity (Company account)
    87,386 GBP2024-03-31
    Officer
    2017-02-22 ~ now
    IIF 2 - Director → ME
    Person with significant control
    2017-02-22 ~ now
    IIF 10 - Ownership of shares – More than 25% but not more than 50%OE
    IIF 10 - Ownership of voting rights - More than 25% but not more than 50%OE
Ceased 3
  • 1
    Tue Ironworks, Unit 7 Norfolk Bridge Business Park, Foley Street, Sheffield, South Yorkshire
    Active Corporate (1 parent)
    Equity (Company account)
    44,472.55 GBP2024-03-31
    Officer
    2010-02-11 ~ 2022-03-31
    IIF 6 - Director → ME
    Person with significant control
    2017-02-01 ~ 2022-03-31
    IIF 12 - Ownership of voting rights - More than 25% but not more than 50% OE
    IIF 12 - Ownership of shares – More than 25% but not more than 50% OE
  • 2
    The Ironworks Unit 7 Norfolk Bridge Business Park, Foley Street, Sheffield, South Yorkshire
    Dissolved Corporate (3 parents)
    Equity (Company account)
    1 GBP2021-03-31
    Person with significant control
    2016-10-18 ~ 2022-06-27
    IIF 9 - Ownership of shares – 75% or more OE
  • 3
    The Ironworks, Unit 7 Norfolk Bridge Business Park, Foley Street, Sheffield, England
    Active Corporate (3 parents, 1 offspring)
    Equity (Company account)
    815,071 GBP2023-12-31
    Officer
    1999-09-02 ~ 2024-11-22
    IIF 5 - Director → ME
    1999-09-02 ~ 2024-11-22
    IIF 8 - Secretary → ME
    Person with significant control
    2016-08-25 ~ 2022-06-27
    IIF 11 - Has significant influence or control OE
    IIF 11 - 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.