DP

DIPLOMA PLC

Active

Company number 03899848

London, England · Incorporated 24 December 1999

10-11 Charterhouse Square, London, EC1M 6EE, England

Last updated on 20 September 2026

Activities of head offices · SIC 70100

Status
Active
Company age
26 years
Company type
Public limited
Accounts
Up to date
Total raised
£236,128,939
Shares allotted
9,692,415
Latest round
17 November 2025

Company history

Previous company names

MERGESECTOR PUBLIC LIMITED COMPANY · 24 December 1999 – 22 February 2000

NEW DIPLOMA PLC · 22 February 2000 – 17 April 2000

Company overview

DIPLOMA PLC is an active public limited company incorporated on 24 December 1999 and registered in England and Wales. It has changed its name 2 times, most recently from NEW DIPLOMA PLC on 22 February 2000. Its registered office is at 10-11 Charterhouse Square, London, EC1M 6EE, England. Its principal activity is activities of head offices (SIC 70100).

The board consists of 10 directors: THOMSON, Jonathan David (appointed 25 February 2019), FINCH, Dean Kendal (appointed 21 May 2021), LOWDEN, David Soutar (appointed 19 October 2021), WARD, Jennifer Suzanne (appointed 1 June 2023), STIPP, Janice Elaine (appointed 17 January 2024), BICKERSTAFFE, Katie (appointed 1 October 2024), EL-MOKADEM, Ian Ramsey Safwat (appointed 15 January 2025), NG, Wilson (appointed 14 August 2025), PHYFER, Cheri Marie (appointed 2 March 2026) and GRADDEN, Amanda Jane (appointed 1 June 2026). LAWRENCE, Anna serves as company secretary (appointed 30 May 2025). 26 former officers have previously served the company.

There are no registered charges against the company, no history of insolvency, and it has never been through liquidation. Its most recent group accounts, made up to 30 September 2025, were filed on 29 January 2026. The next accounts are due by 31 March 2027. The latest confirmation statement was made up to 22 December 2025. The next is due by 5 January 2027. Companies House holds 200 filings for this company, most recently an officers filing on 15 July 2026.

Compliance

Annual accounts Up to date
Last filed
30 September 2025
Next due
31 March 2027
7 months left
Confirmation statement Up to date
Last filed
22 December 2025
Next due
5 January 2027
4 months left

Financial snapshot

Last accounts type
Group
Period end
30 September 2025

Detailed figures (assets, liabilities, net worth) are available in the full credit report.

Capital table

Updated on 20 September 2026
Total shares
0
Nominal value
£6,704,598.750
AI confidence
(—%)
Data quality
-

Share classes

Class Allocated shares Currency Nominal value Voting Dividend Transfer Anti-dilution
ORDINARY 134,091,975 GBP —
Total 0

Officers

GA
GRADDEN, Amanda Jane
Director
1 June 2026
PC
PHYFER, Cheri Marie
Director
2 March 2026
NW
NG, Wilson
Director
14 August 2025
LA
LAWRENCE, Anna
Secretary
30 May 2025
EI
EL-MOKADEM, Ian Ramsey Safwat
Director
15 January 2025
BK
BICKERSTAFFE, Katie
Director
1 October 2024
SJ
STIPP, Janice Elaine
Director
17 January 2024
WJ
WARD, Jennifer Suzanne
Director
1 June 2023
LD
LOWDEN, David Soutar
Director
19 October 2021
FD
FINCH, Dean Kendal
Director
21 May 2021
TJ
THOMSON, Jonathan David
Director
25 February 2019
DC
DAVIES, Christopher Mark
Director · Resigned
1 November 2022
GB
GIBBES, Barbara
Director · Resigned
22 June 2020
MJ
MORRISON, John
Secretary · Resigned
5 May 2020
HG
HUSE, Geraldine Claire
Director · Resigned
20 January 2020
IR
INGRAM, Richard John
Director · Resigned
23 April 2018
TA
THORBURN, Anne
Director · Resigned
7 September 2015
SA
SMITH, Andrew Patrick
Director · Resigned
10 February 2015
PC
PACKSHAW, Charles Max
Director · Resigned
1 June 2013
NJ
NICHOLAS, John Edward
Director · Resigned
1 June 2013
CM
CLAYTON, Marie-Louise Louise
Director · Resigned
13 November 2012
GA
GALLAGHER, Anthony James
Secretary · Resigned
21 September 2012
GI
GRICE, Ian Michael
Director · Resigned
24 January 2007
MJ
MATTHEWS, John Waylett
Director · Resigned
24 July 2003
RJ
RENNOCKS, John Leonard
Director · Resigned
2 July 2002
LN
LINGWOOD, Nigel Peter
Director · Resigned
3 July 2001
RW
REID, William
Director · Resigned
21 February 2000
TA
THOMAS, Aubrey John Christopher
Director · Resigned
21 February 2000
SB
STEWARTBY, Bernard Harold Ian Halley, Lord
Director · Resigned
21 February 2000
HJ
HENDERSON, John Iain
Director · Resigned
21 February 2000
PA
PARKINSON, Andrew Michael Reay
Director · Resigned
24 January 2000
TB
THOMPSON, Bruce Mckenzie
Director · Resigned
24 January 2000
SI
SWIFT INCORPORATIONS LIMITED
Corporate Nominee Director · Resigned
24 December 1999
IC
INSTANT COMPANIES LIMITED
Corporate Nominee Director · Resigned
24 December 1999

Persons with significant control

No persons with significant control on record.

Funding

6 funding rounds
17 November 2025
ORDINARY · 141,191 shares allotted
£7,060
19 November 2024
ORDINARY · 84,232 shares allotted
£4,212
21 March 2023
ORDINARY · 9,350,965 shares allotted
£236,111,866
21 November 2022
ORDINARY · 63,372 shares allotted
£3,169
22 November 2021
ORDINARY · 52,655 shares allotted
£2,633
25 September 2020
Shares allotted · 0 shares allotted
—
Total (6 rounds, 9,692,415 shares)
£236,128,939

Filing history

Termination Director Company With Name Termination Date
Officers
15 July 2026 View
Appoint Person Director Company With Name Date
Officers
18 June 2026 View
Appoint Person Director Company With Name Date
Officers
5 March 2026 View
Resolution
Resolution
4 February 2026 View
Accounts With Accounts Type Group
Accounts
29 January 2026 View
Confirmation Statement With No Updates
Confirmation Statement
31 December 2025 View
Change Person Director Company With Change Date
Officers
29 December 2025 View
Capital Allotment Shares
Capital
1 December 2025 View
Appoint Person Director Company With Name Date
Officers
14 August 2025 View
Termination Director Company With Name Termination Date
Officers
14 August 2025 View
Appoint Person Secretary Company With Name Date
Officers
30 May 2025 View
Termination Secretary Company With Name Termination Date
Officers
30 May 2025 View
Resolution
Resolution
24 January 2025 View
Accounts With Accounts Type Group
Accounts
23 January 2025 View
Appoint Person Director Company With Name Date
Officers
15 January 2025 View
Confirmation Statement With No Updates
Confirmation Statement
27 December 2024 View
Change Person Director Company With Change Date
Officers
3 December 2024 View
Capital Allotment Shares
Capital
20 November 2024 View
Appoint Person Director Company With Name Date
Officers
2 October 2024 View
Termination Director Company With Name Termination Date
Officers
2 October 2024 View
Termination Director Company With Name Termination Date
Officers
16 July 2024 View
Change Person Director Company With Change Date
Officers
10 April 2024 View
Accounts With Accounts Type Group
Accounts
16 February 2024 View
Resolution
Resolution
27 January 2024 View
Appoint Person Director Company With Name Date
Officers
17 January 2024 View
Confirmation Statement With Updates
Confirmation Statement
22 December 2023 View
Appoint Person Director Company With Name Date
Officers
1 June 2023 View
Capital Allotment Shares
Capital
21 March 2023 View
Change Person Director Company With Change Date
Officers
7 March 2023 View
Accounts With Accounts Type Group
Accounts
1 February 2023 View
Resolution
Resolution
24 January 2023 View
Confirmation Statement With No Updates
Confirmation Statement
28 December 2022 View
Capital Allotment Shares
Capital
29 November 2022 View
Appoint Person Director Company With Name Date
Officers
1 November 2022 View
Termination Director Company With Name Termination Date
Officers
11 October 2022 View
Change Person Director Company With Change Date
Officers
25 July 2022 View
Accounts With Accounts Type Group
Accounts
17 February 2022 View
Resolution
Resolution
28 January 2022 View
Termination Director Company With Name Termination Date
Officers
19 January 2022 View
Change Registered Office Address Company With Date Old Address New Address
Address
5 January 2022 View
Confirmation Statement With No Updates
Confirmation Statement
22 December 2021 View
Capital Allotment Shares
Capital
22 November 2021 View
Appoint Person Director Company With Name Date
Officers
20 October 2021 View
Appoint Person Director Company With Name Date
Officers
21 May 2021 View
Accounts With Accounts Type Group
Accounts
15 February 2021 View
Memorandum Articles
Incorporation
22 January 2021 View
Resolution
Resolution
22 January 2021 View
Termination Director Company With Name Termination Date
Officers
20 January 2021 View
Confirmation Statement With No Updates
Confirmation Statement
22 December 2020 View
Capital Allotment Shares
Capital
30 September 2020 View
Appoint Person Director Company With Name Date
Officers
23 June 2020 View
Termination Director Company With Name Termination Date
Officers
23 June 2020 View
Appoint Person Secretary Company With Name Date
Officers
6 May 2020 View
Termination Secretary Company With Name Termination Date
Officers
6 May 2020 View
Appoint Person Director Company With Name Date
Officers
24 January 2020 View
Accounts With Accounts Type Group
Accounts
22 January 2020 View
Resolution
Resolution
21 January 2020 View
Confirmation Statement With No Updates
Confirmation Statement
22 December 2019 View
Appoint Person Director Company With Name Date
Officers
25 February 2019 View
Change Person Director Company With Change Date
Officers
28 January 2019 View
Resolution
Resolution
24 January 2019 View
Accounts With Accounts Type Group
Accounts
21 January 2019 View
Confirmation Statement With Updates
Confirmation Statement
24 December 2018 View
Termination Director Company With Name Termination Date
Officers
29 August 2018 View
Termination Director Company With Name Termination Date
Officers
9 May 2018 View
Appoint Person Director Company With Name Date
Officers
23 April 2018 View
Resolution
Resolution
23 January 2018 View
Accounts With Accounts Type Group
Accounts
19 January 2018 View
Confirmation Statement With No Updates
Confirmation Statement
29 December 2017 View
Accounts With Accounts Type Group
Accounts
7 February 2017 View
Resolution
Resolution
2 February 2017 View
Confirmation Statement With Updates
Confirmation Statement
22 December 2016 View
Change Person Director Company With Change Date
Officers
22 July 2016 View
Accounts With Accounts Type Group
Accounts
16 February 2016 View
Resolution
Resolution
16 February 2016 View
Termination Director Company With Name Termination Date
Officers
20 January 2016 View
Annual Return Company With Made Up Date No Member List
Annual Return
22 December 2015 View
Termination Director Company With Name Termination Date
Officers
24 November 2015 View
Appoint Person Director Company With Name Date
Officers
8 September 2015 View
Accounts With Accounts Type Group
Accounts
11 February 2015 View
Resolution
Resolution
11 February 2015 View
Appoint Person Director Company With Name Date
Officers
10 February 2015 View
Annual Return Company With Made Up Date Full List Shareholders
Annual Return
26 January 2015 View
Termination Director Company With Name Termination Date
Officers
21 January 2015 View
Resolution
Resolution
31 January 2014 View
Accounts With Accounts Type Group
Accounts
22 January 2014 View
Annual Return Company With Made Up Date No Member List
Annual Return
20 January 2014 View
Termination Director Company With Name
Officers
1 October 2013 View
Termination Director Company With Name
Officers
1 October 2013 View
Second Filing Of Form With Form Type Made Up Date
Document Replacement
12 July 2013 View
Appoint Person Director Company With Name
Officers
4 June 2013 View
Appoint Person Director Company With Name
Officers
4 June 2013 View
Accounts With Accounts Type Group
Accounts
24 January 2013 View
Resolution
Resolution
24 January 2013 View
Resolution
Resolution
24 January 2013 View
Annual Return Company With Made Up Date No Member List
Annual Return
17 January 2013 View
Change Person Director Company With Change Date
Officers
19 December 2012 View
Appoint Person Director Company With Name
Officers
15 November 2012 View
Appoint Person Secretary Company With Name
Officers
25 September 2012 View
Termination Secretary Company With Name
Officers
25 September 2012 View
Accounts With Accounts Type Group
Accounts
13 March 2012 View
Annual Return Company With Made Up Date No Member List
Annual Return
1 February 2012 View
Resolution
Resolution
27 January 2012 View
Annual Return Company With Made Up Date Bulk List Shareholders
Annual Return
18 January 2011 View
Resolution
Resolution
18 January 2011 View
Accounts With Accounts Type Group
Accounts
18 January 2011 View
Statement Of Companys Objects
Change Of Constitution
20 January 2010 View
Annual Return Company With Made Up Date Full List Shareholders
Annual Return
18 January 2010 View
Accounts With Accounts Type Group
Accounts
18 January 2010 View
Resolution
Resolution
18 January 2010 View
Change Person Secretary Company With Change Date
Officers
19 October 2009 View
Move Registers To Sail Company
Address
12 October 2009 View
Change Sail Address Company
Address
12 October 2009 View
Change Person Director Company With Change Date
Officers
9 October 2009 View
Change Person Director Company With Change Date
Officers
9 October 2009 View
Change Person Director Company With Change Date
Officers
9 October 2009 View
Change Person Director Company With Change Date
Officers
9 October 2009 View
Change Person Director Company With Change Date
Officers
9 October 2009 View
Change Person Director Company With Change Date
Officers
9 October 2009 View
Legacy
Annual Return
29 January 2009 View
Resolution
Resolution
19 January 2009 View
Accounts With Accounts Type Group
Accounts
19 January 2009 View
Auditors Resignation Company
Auditors
16 October 2008 View
Legacy
Capital
7 February 2008 View
Accounts With Accounts Type Group
Accounts
25 January 2008 View
Legacy
Annual Return
25 January 2008 View
Legacy
Capital
25 January 2008 View
Resolution
Resolution
25 January 2008 View
Resolution
Resolution
25 January 2008 View
Resolution
Resolution
25 January 2008 View
Resolution
Resolution
25 January 2008 View
Resolution
Resolution
25 January 2008 View
Resolution
Resolution
25 January 2008 View
Legacy
Address
19 July 2007 View
Legacy
Officers
2 February 2007 View
Legacy
Annual Return
2 February 2007 View
Legacy
Officers
29 January 2007 View
Resolution
Resolution
18 January 2007 View
Resolution
Resolution
18 January 2007 View
Resolution
Resolution
18 January 2007 View
Resolution
Resolution
18 January 2007 View
Accounts With Accounts Type Group
Accounts
3 January 2007 View
Resolution
Resolution
3 February 2006 View
Resolution
Resolution
3 February 2006 View
Resolution
Resolution
3 February 2006 View
Resolution
Resolution
3 February 2006 View
Resolution
Resolution
3 February 2006 View
Legacy
Annual Return
27 January 2006 View
Accounts With Accounts Type Group
Accounts
28 December 2005 View
Legacy
Annual Return
17 January 2005 View
Accounts With Accounts Type Group
Accounts
7 January 2005 View
Legacy
Annual Return
26 January 2004 View
Resolution
Resolution
16 January 2004 View
Legacy
Officers
13 January 2004 View
Accounts With Accounts Type Group
Accounts
24 December 2003 View
Legacy
Officers
31 July 2003 View
Auditors Resignation Company
Auditors
1 June 2003 View
Auditors Resignation Company
Auditors
7 April 2003 View
Legacy
Annual Return
16 January 2003 View
Legacy
Officers
14 January 2003 View
Accounts With Accounts Type Group
Accounts
9 December 2002 View
Legacy
Officers
17 July 2002 View
Legacy
Annual Return
7 February 2002 View
Legacy
Capital
17 December 2001 View
Accounts With Accounts Type Group
Accounts
14 December 2001 View
Legacy
Officers
17 July 2001 View
Legacy
Officers
17 July 2001 View
Accounts With Accounts Type Interim
Accounts
3 July 2001 View
Accounts With Accounts Type Full Group
Accounts
26 June 2001 View
Legacy
Annual Return
2 February 2001 View
Legacy
Capital
31 May 2000 View
Memorandum Articles
Incorporation
31 May 2000 View
Legacy
Capital
17 May 2000 View
Resolution
Resolution
2 May 2000 View
Resolution
Resolution
2 May 2000 View
Resolution
Resolution
2 May 2000 View
Resolution
Resolution
2 May 2000 View
Certificate Change Of Name Company
Change Of Name
17 April 2000 View
Legacy
Capital
9 March 2000 View
Memorandum Articles
Incorporation
1 March 2000 View
Resolution
Resolution
1 March 2000 View
Resolution
Resolution
1 March 2000 View
Resolution
Resolution
1 March 2000 View
Resolution
Resolution
1 March 2000 View
Legacy
Capital
1 March 2000 View
Legacy
Capital
1 March 2000 View
Legacy
Accounts
1 March 2000 View
Legacy
Officers
1 March 2000 View
Legacy
Officers
1 March 2000 View
Legacy
Officers
1 March 2000 View
Legacy
Officers
1 March 2000 View
Certificate Authorisation To Commence Business Borrow
Incorporation
28 February 2000 View
Application To Commence Business
Incorporation
28 February 2000 View
Certificate Change Of Name Company
Change Of Name
22 February 2000 View
Legacy
Officers
8 February 2000 View
Legacy
Officers
8 February 2000 View
Legacy
Officers
8 February 2000 View
Legacy
Officers
8 February 2000 View
Legacy
Address
8 February 2000 View
Incorporation Company
Incorporation
24 December 1999 View

Risk at a glance

  • Company active
  • Accounts up to date
  • Confirmation statement up to date
  • No insolvency history
  • No registered charges
  • Credit score
  • Recommended limit
  • Payment risk

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