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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 Alexander Talbot Johnstone

Mark Alexander Talbot Johnstone is a trustee of The Guide Dogs for the Blind Association (since 2020) and a director of 2 companies. Source: Companies House and Charity Commission records.

Director at Guide Dogs UK Limited · Trustee at The Guide Dogs for the Blind Association

  • 3 current roles
  • 14 previous roles
  • Served alongside 184 people
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Official record Companies House and Charity Commission · updated 18th October 2026

Roles

17 roles across 17 organisations (3 current, 14 previous)

Current roles (3)

Previous roles (14)

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

184 people across 9 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 Guide Dogs for the Blind Association 48 people · 1992-present

The Guide Dogs for the Blind Association 10 people · 2020-present

Guide Dogs UK Limited 3 people · 2025-present

OLD Vicarage School Trust 64 people · 1992-2026

Scope 41 people · 1992-2025

Sources

Companies House
Officer appointments and resignations.
Charity Commission
Register of Charities: current trustees and appointment dates.
Edition
Register edition compiled 18th 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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