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Sir John Ralph Sidney Guinness
Sir John Ralph Sidney Guinness was previously a director of The Royal Collection Trust (until 2007) and 6 other organisations. Source: Companies House records.
Director at The Royal Collection Trust · Director at United Kingdom - Japan 21ST Century Group
- 0 current roles
- 7 previous roles
- Served alongside 229 people
John's network: 229 people across 7 organisations
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Official record Companies House · updated 4th October 2026 · Free, no card or password
Roles
7 roles across 7 organisations-
The Royal Collection TrustDirector · 2001-2007
Official record · Companies House
- Source
- Companies House
- Organisation
- The Royal Collection Trust
- Role
- Director
- Appointed
- 2001-06-08
- Ended
- 2007-06-07
- Record reference
- Company 02713536
Previous -
United Kingdom - Japan 21ST Century GroupDirector · 1995-1999
Official record · Companies House
- Source
- Companies House
- Organisation
- United Kingdom - Japan 21ST Century Group
- Role
- Director
- Appointed
- 1995-02-15
- Ended
- 1999-08-19
- Record reference
- Company 02042768
Previous -
Mithras Investment Trust PLCDirector · 1994-2006
Official record · Companies House
- Source
- Companies House
- Organisation
- Mithras Investment Trust PLC
- Role
- Director
- Appointed
- 1994-01-20
- Ended
- 2006-05-10
- Record reference
- Company 02478424
Previous
4 more roles, with dates and sources
Sign in free to see all rolesPeople John has served alongside
229 people across 7 organisationsBased on overlapping official board records. Calculated from official records
229 people across 7 organisations
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- Companies House
- Officer appointments and resignations.
- Edition
- Register edition compiled 4th October 2026
- Identity
- Records are treated as the same person only where the evidence confirms it. How people are matched