DIPLOMA HOLDINGS PLC
Company number 00256111 · Monitor this company
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Overview
- Company type
- Public Limited Company
- Incorporated
- 1931-05-01
- Registered office
- 10-11 Charterhouse Square, London, England, EC1M 6EE
- Postcode
- EC1M 6EE
- Capital
- 2 GBP
- Accounts category
- Full
- Charges
- 1 outstanding
Accounts
- Last made up to
- 2025-09-30
- Next due by
- 2027-03-31
- Financial year end
- 30 September
Confirmation statement
- Last statement dated
- 2026-02-24
- Next due by
- 2027-03-10
Nature of business (SIC)
- 70100 Activities of head offices
Officers 4 current · 20 resigned
Group structure 20 subsidiaries
Controlled by DIPLOMA PLC — since 2016-04-06
Showing 12 of 20.
From persons-with-significant-control filings on the public register.
Modern slavery statement
Registered a modern slavery statement for 2026 (period to 2025-09-30) as part of the DIPLOMA PLC group statement — 6 years on the registry.
Read the statement summary on the government modern slavery statement registry. Contains public sector information licensed under the Open Government Licence v3.0.
Previous company names
| Name | Date changed |
|---|---|
| DIPLOMA P.L.C. | 2000-04-17 |
| DIPLOMA INVESTMENTS LIMITED | 1978-12-31 |
Previous registered addresses 2
| Address | Changed on |
|---|---|
| 12 CHARTERHOUSE SQUARE, LONDON, EC1M 6AX | 2008-01-02 |
| 20 BUNHILL ROW, LONDON, EC1Y 8UD | 2007-07-19 |
Among its peers
Among the oldest 25%
of 1,686 similar companies in EC, trading since 1931
Property in England & Wales 3 titles
- Freehold
- 1
- Leasehold
- 2
- Most recent registration
- 2023-12-14
- Where
- Greater London (2), North Somerset (1)
| Title number | County | Tenure | Registered | Price paid |
|---|---|---|---|---|
| AGL613067 | Greater London | Leasehold | 2023-12-14 | — |
| AGL543963 | Greater London | Leasehold | 2021-09-07 | — |
| AV252469 | North Somerset | Freehold | 2007-12-13 | — |
For addresses and the authoritative register entry, use HM Land Registry's official search (£3 per title).
Information produced by HM Land Registry. © Crown copyright 2026. Dataset as at 2026-08.