The Governance RegisterEdition 2026 · Compiled 12th July 2026

Diploma PLC

Company 03899848 Active

Connected board network

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Board DNA

How this board is put together, from the Companies House officer record and Charity Commission trustee records - deterministic, no AI.iBoard compositionCounted from the dated Companies House officer record: the current directors only, past directors excluded.

11 directors on the board

3.1y median 2.5y
average tenure
7.4y
longest tenure

Directors past 6 years

First-time vs portfolio directors

First-time (2)

Portfolio (9)

Left in the last 12 months

Where else this board sits iWhere else this board sitsThe charitable fields these directors govern in elsewhere, by Charity Commission classification. Excludes this company and any charity it is the legal face of.

Professional services 11Finance 5Construction 4Arts and leisure 1Dormant 1Property 1Tech and media 1Utilities 1

The sectors these directors govern in elsewhere. This company, and any charity it is the legal face of, are excluded - counting them would just tell you what you are already looking at.

Related organisations iRelated organisationsTwo groups, both deterministic from public records. Related organisations share two or more directors with this board - a real structural link, such as a subsidiary or group company. Connected through a shared director share exactly one person - a genuine connection, but not the same group.

Related organisations

Connected through a shared director

Deterministic, from public records.

Company details

Number03899848
StatusActive
TypePublic Limited Company
Incorporated24/12/1999
Address10-11 CHARTERHOUSE SQUARE, LONDON, EC1M 6EE
Accounts next due31/03/2027
Accounts last made up30/09/2025

Industry (SIC)

70100 - Activities of head offices

Ownership - persons with significant control (0)

No persons with significant control recorded.

Owns 2 companies iOwnsCompanies where this company is registered as having significant control, from the Companies House PSC (persons with significant control) register.

Officers (31)

Show 19 former officers

Directors and officers on the Companies House record, current and former.

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