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The red node is Mark. Pale nodes are charities, grey nodes are companies, and darker grey nodes are the people who sit on them. Dashed links are historical or inferred. Click any node to explore.

Person

Mark Patrick Seebold Horn

Mark Patrick Seebold Horn is a trustee of The Carpenters' and Dockland Community Centre and The Dockland Settlements, a director of 6 companies and holds 2 other current roles. Source: Companies House and Charity Commission records.

Director at Rooff Construction LTD · Director at Rooff Holdings Limited

  • 10 current roles
  • 6 previous roles
  • Served alongside 61 people
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Official record Companies House and Charity Commission · updated 25th October 2026

Roles

16 roles across 15 organisations (10 current, 6 previous)

Current roles (10)

Previous roles (6)

Charity trustee roles come from the current Charity Commission register, which lists serving trustees only. Company roles, current and past, come from Companies House.

People Mark has served alongside

61 people across 13 organisations

Based on overlapping official board records. Calculated from official records It does not mean they know each other. Only formal co-service is listed: people are never joined on a matching name alone.

The Dockland Settlements 23 people · 1992-present

Rooff LTD 15 people · 1993-present

Rooff Employee Services LLP 13 people · 2011-present

Rooff Residential LTD. 12 people · 1993-present

The Carpenters' and Dockland Community Centre 8 people · Current

The Dockland Settlements 8 people · Current

Rooff Construction LTD 8 people · 2021-present

Rooff Holdings Limited 6 people · 2019-present

Horn Property Developments Limited 4 people · 1999-present

Carnarvon Road Limited (dissolved 2017) 4 people · 2013-present

Harprooff Holdings Limited (dissolved 2016) 3 people · 2013-present

Rooff Property LLP 2 people · 2006-present

29/31 Danbury Street Management Company Limited 9 people · 1992-2002

Sources

Companies House
Officer appointments and resignations.
Charity Commission
Register of Charities: current trustees and appointment dates.
Edition
Register edition compiled 25th October 2026
Identity
Records are treated as the same person only where our identity-matching rules support it. Confirmed relationships are supported by the approved identity-matching evidence and rules. Likely relationships are supported by sufficient evidence to suggest the records concern the same individual, but are not established as confirmed; they are shown with the label “Likely the same person”. How people are matched

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