Diploma Holdings PLC

Active00256111 Public limited company

Incorporated: 1 May 1931 (95 years)
Previously known as: Diploma P.L.C. (until 17 April 2000)
Diploma Investments Limited (until 31 December 1978)
Industry: Activities of head offices (70100)
Directors: Wilson Ng
Anna Louise Lawrence
Jonathan David Thomson
Owned by: Diploma PLC
Accounts type: Full
Region: Greater London
Address: 10-11 Charterhouse Square
London
EC1M 6EE

Website & contact details

Group website: diplomaplc.com via Diploma PLC
The site of this company’s group or brand.

Filing status

Accounts due: 31 March 2027
Last accounts: 30 September 2025
Conf. stmt due: 10 March 2027
Last conf. stmt: 24 February 2026

Charges

Total: 2
Outstanding: 0
Part satisfied: 0
Satisfied: 2

Officers 4 active

Officer details are public data from the Companies House register.

Ng, Wilson

Director · Appointed 14 August 2025

Also at M Seals UK Limited, Diploma PLC, Newlandglebe Limited · more companies

Malaysian

Born September 1981 (45)

Lawrence, Anna

Secretary · Appointed 30 May 2025

Lawrence, Anna Louise

Director · Appointed 30 May 2025

Also at M Seals UK Limited, Sealco International Limited, Diploma UK Holdings Limited · more companies

British

Born May 1979 (47)

Thomson, Jonathan David

Director · Appointed 16 May 2019

Also at Diploma Overseas Limited, Diploma PLC, Corpacq Group Limited · more companies

British

Born August 1972 (54)

Officer history (17 former)

14 August 2025

Appointed Ng, Wilson as Director

13 August 2025

Resigned Davies, Christopher Mark as Director

30 May 2025

Resigned Morrison, John as Secretary

30 May 2025

Appointed Lawrence, Anna as Secretary

30 May 2025

Appointed Lawrence, Anna Louise as Director

30 May 2025

Resigned Morrison, John as Director

1 November 2022

Appointed Davies, Christopher Mark as Director

1 October 2022

Appointed Morrison, John as Director

30 September 2022

Resigned Gibbes, Barbara as Director

22 June 2020

Appointed Gibbes, Barbara as Director

22 June 2020

Resigned Lingwood, Nigel Peter as Director

5 May 2020

Appointed Morrison, John as Secretary

5 May 2020

Resigned Gallagher, Anthony James as Secretary

16 May 2019

Resigned Nicholas, John Edward as Director

16 May 2019

Appointed Thomson, Jonathan David as Director

28 August 2018

Appointed Nicholas, John Edward as Director

28 August 2018

Resigned Ingram, Richard John as Director

8 May 2018

Appointed Ingram, Richard John as Director

8 May 2018

Resigned Thompson, Bruce Mckenzie as Director

31 March 2016

Resigned Henderson, John Iain as Director

16 January 2013

Appointed Gallagher, Anthony James as Secretary

16 January 2013

Resigned Lingwood, Nigel Peter as Secretary

10 January 2002

Resigned Thomas, Aubrey John Christopher as Director

21 September 2001

Resigned Reid, William as Director

21 September 2001

Resigned Lord Stewartby, Bernard Harold Ian Halley, Lord Stewartby as Director

3 July 2001

Resigned Parkinson, Andrew Michael Reay as Secretary

3 July 2001

Appointed Lingwood, Nigel Peter as Secretary

3 July 2001

Appointed Lingwood, Nigel Peter as Director

3 July 2001

Resigned Parkinson, Andrew Michael Reay as Director

6 January 1998

Appointed Henderson, John Iain as Director

3 October 1994

Appointed Thompson, Bruce Mckenzie as Director

1 August 1994

Appointed Reid, William as Director

28 October 1993

Resigned Walker, Barry Matthew as Director

8 January 1993

Appointed Walker, Barry Matthew as Director

Ownership 1 active

People and entities with significant control, from the Companies House PSC register

Diploma PLC

Corporate entity · Notified 6 April 2016

Owns 75–100% of shares

Holds 75–100% of voting rights

Right to appoint and remove directors

Public Company Limited By Shares

Reg. no. 3899848

Group structure 34 shown

Ownership group derived from the Companies House PSC register

Diploma PLC

Diploma Holdings PLC This company Owns 75–100% of shares

Diploma Asia Holdings Limited Owns 75–100% of shares

Diploma Australia Holdings Limited Owns 75–100% of shares

Diploma Canada Holdings Limited Owns 75–100% of shares

Diploma Europe Holdings Limited Owns 75–100% of shares

Diploma Latam Holdings Limited Owns 75–100% of shares

Diploma One Limited Owns 75–100% of shares

Diploma Two Limited Owns 75–100% of shares

Diploma UK Holdings Limited Owns 75–100% of shares

Alpha Laboratories Limited Owns 75–100% of shares

Cabletec Interconnect Components Systems Limited Owns 75–100% of shares

Clarendon Specialty Fasteners Limited Owns 75–100% of shares

I.S. Group (Europe) Limited Owns 75–100% of shares

Is-Rayfast Limited Owns 75–100% of shares

Krempfast Limited Owns 75–100% of shares

Spring Industrial Limited Owns 75–100% of shares

Swift Aerospace Services Limited Owns 75–100% of shares

The Lodge Group Limited Owns 75–100% of shares

WDS Components Limited Owns 75–100% of shares

M Seals UK Limited Owns 75–100% of shares

Medilink Services (NI) Limited Owns 75–100% of shares

Newlandglebe Limited Owns 75–100% of shares

R&G Fluid Power Holdings Limited Owns 75–100% of shares

R&G Fluid Power Group Limited Owns 75–100% of shares

Shoal Group Limited Owns 75–100% of shares

Cablecraft Limited Owns 75–100% of shares

FS Cables Limited Owns 75–100% of shares

FSC Global Limited Owns 75–100% of shares

Specialised Wiring Accessories Limited Owns 75–100% of shares

Techsil Group Holdings Limited Owns 75–100% of shares

Techsil Holdings Limited Owns 75–100% of shares

Williamson, Cliff Limited Owns 75–100% of shares

Diploma Overseas Limited Owns 75–100% of shares

Filings 228

Date	Description	Made Up To
9 April 2026	Full accounts	30 September 2025
2 March 2026	Confirmation statement with no updates	24 February 2026
14 August 2025	Termination of appointment of a director
14 August 2025	Appointment of a director
30 May 2025	Termination of appointment of a director