DIPLOMA PLC

Company summary

Company number: 03899848
Status: ACTIVE
Incorporated / age: 24 December 199926 years
Registered office: 10-11 Charterhouse Square, London, EC1M 6EE, England
Accounts due: 31 March 2027
Confirmation statement due: 5 January 2027
Active officers: 11
Outstanding charges: 0

Sourced from Companies House, retrieved 3 October 2026 at 23:47 UTC. This is public register information, not a credit or legal assessment.

View this company on the Companies House register

Company type
Public limited company
Address
10-11 Charterhouse Square, London, EC1M 6EE, England
Nature of business
Activities of head offices
Previous company names
NEW DIPLOMA PLC
MERGESECTOR PUBLIC LIMITED COMPANY

Officer details

Name	Role	Appointed On	Resigned On	Country of Residence	Date of Birth	Address
LAWRENCE, Anna ACTIVE	Secretary	30 May 2025				10-11, Charterhouse Square, London, EC1M 6EE, England
BICKERSTAFFE, Katie ACTIVE	Director	01 Oct 2024		England	April 1967	10-11, Charterhouse Square, London, EC1M 6EE, England
EL-MOKADEM, Ian Ramsey Safwat ACTIVE	Director	15 Jan 2025		England	February 1968	10-11, Charterhouse Square, London, EC1M 6EE, England
FINCH, Dean Kendal ACTIVE	Director	21 May 2021		England	July 1966	10-11, Charterhouse Square, London, EC1M 6EE, England
GRADDEN, Amanda Jane ACTIVE	Director	01 Jun 2026		England	March 1968	10-11, Charterhouse Square, London, EC1M 6EE, England
LOWDEN, David Soutar ACTIVE	Director	19 Oct 2021		England	August 1957	10-11, Charterhouse Square, London, EC1M 6EE, England
NG, Wilson ACTIVE	Director	14 Aug 2025		England	September 1981	10-11, Charterhouse Square, London, EC1M 6EE, England
PHYFER, Cheri Marie ACTIVE	Director	02 Mar 2026		United States	October 1971	10-11, Charterhouse Square, London, EC1M 6EE, England
STIPP, Janice Elaine ACTIVE	Director	17 Jan 2024		United States	September 1959	10-11, Charterhouse Square, London, EC1M 6EE, England
THOMSON, Jonathan David ACTIVE	Director	25 Feb 2019		England	August 1972	10-11, Charterhouse Square, London, EC1M 6EE, England
WARD, Jennifer Suzanne ACTIVE	Director	01 Jun 2023		England	September 1973	10-11, Charterhouse Square, London, EC1M 6EE, England
GALLAGHER, Anthony James RESIGNED	Secretary	21 Sep 2012	05 May 2020			12 Charterhouse Square, London, EC1M 6AX
LINGWOOD, Nigel Peter RESIGNED	Secretary	03 Jul 2001	21 Sep 2012			12 Charterhouse Square, London, EC1M 6AX
MORRISON, John RESIGNED	Secretary	05 May 2020	30 May 2025			10-11, Charterhouse Square, London, EC1M 6EE, England
PARKINSON, Andrew Michael Reay RESIGNED	Secretary	24 Jan 2000	03 Jul 2001			Tadlow House, Tadlow, Royston, Hertfordshire, SG8 0EL
SWIFT INCORPORATIONS LIMITED RESIGNED	Nominee Secretary	24 Dec 1999	24 Jan 2000			26, Church Street, London, NW8 8EP
CLAYTON, Marie-Louise Louise RESIGNED	Director	13 Nov 2012	16 Nov 2015	England	August 1960	12 Charterhouse Square, London, EC1M 6AX
DAVIES, Christopher Mark RESIGNED	Director	01 Nov 2022	13 Aug 2025	England	March 1970	10-11, Charterhouse Square, London, EC1M 6EE, England
GIBBES, Barbara RESIGNED	Director	22 Jun 2020	30 Sep 2022	England	July 1975	10-11, Charterhouse Square, London, EC1M 6EE, England
GRICE, Ian Michael RESIGNED	Director	24 Jan 2007	30 Sep 2013	United Kingdom	May 1953	12 Charterhouse Square, London, EC1M 6AX
HENDERSON, John Iain RESIGNED	Director	21 Feb 2000	20 Jan 2016	United Kingdom	January 1956	12 Charterhouse Square, London, EC1M 6AX
HUSE, Geraldine Claire RESIGNED	Director	20 Jan 2020	15 Jul 2026	England	September 1963	10-11, Charterhouse Square, London, EC1M 6EE, England
INGRAM, Richard John RESIGNED	Director	23 Apr 2018	28 Aug 2018	United Kingdom	April 1963	12 Charterhouse Square, London, EC1M 6AX
LINGWOOD, Nigel Peter RESIGNED	Director	03 Jul 2001	22 Jun 2020	England	March 1959	12 Charterhouse Square, London, EC1M 6AX
MATTHEWS, John Waylett RESIGNED	Director	24 Jul 2003	30 Sep 2013	England	September 1944	12 Charterhouse Square, London, EC1M 6AX
NICHOLAS, John Edward RESIGNED	Director	01 Jun 2013	19 Jan 2022	Portugal	August 1956	10-11, Charterhouse Square, London, EC1M 6EE, England
PACKSHAW, Charles Max RESIGNED	Director	01 Jun 2013	20 Jan 2021	England	January 1952	12 Charterhouse Square, London, EC1M 6AX
PARKINSON, Andrew Michael Reay RESIGNED	Director	24 Jan 2000	03 Jul 2001		December 1942	Tadlow House, Tadlow, Royston, Hertfordshire, SG8 0EL
REID, William RESIGNED	Director	21 Feb 2000	01 Apr 2003		November 1938	Baykers, Lamb Lane, Sible Hedingham, Halstead, Essex, CO9 3RS
RENNOCKS, John Leonard RESIGNED	Director	02 Jul 2002	21 Jan 2015	United Kingdom	June 1945	12 Charterhouse Square, London, EC1M 6AX
SMITH, Andrew Patrick RESIGNED	Director	10 Feb 2015	16 Jul 2024	England	September 1960	10-11, Charterhouse Square, London, EC1M 6EE, England
STEWARTBY, Bernard Harold Ian Halley, Lord RESIGNED	Director	21 Feb 2000	10 Jan 2007		August 1935	20 Balvaird Place, London, SW1V 3SN
THOMAS, Aubrey John Christopher RESIGNED	Director	21 Feb 2000	07 Jan 2004		December 1930	Stirtloe House Stirtloe, Huntingdon, Cambridgeshire, PE18 9XW
THOMPSON, Bruce Mckenzie RESIGNED	Director	24 Jan 2000	08 May 2018	England	April 1955	12 Charterhouse Square, London, EC1M 6AX
THORBURN, Anne RESIGNED	Director	07 Sep 2015	30 Sep 2024	Scotland	July 1960	10-11, Charterhouse Square, London, EC1M 6EE, England
INSTANT COMPANIES LIMITED RESIGNED	Nominee Director	24 Dec 1999	24 Jan 2000			1, Mitchell Lane, Bristol, Avon, BS1 6BU
SWIFT INCORPORATIONS LIMITED RESIGNED	Nominee Director	24 Dec 1999	24 Jan 2000			26, Church Street, London, NW8 8EP

LAWRENCE, Anna ACTIVE
Role: Secretary
Appointed on: 30 May 2025
Address: 10-11, Charterhouse Square, London, EC1M 6EE, England

BICKERSTAFFE, Katie ACTIVE
Role: Director
Appointed on: 01 Oct 2024
Country of Residence: England
Date of birth: April 1967
Address: 10-11, Charterhouse Square, London, EC1M 6EE, England

EL-MOKADEM, Ian Ramsey Safwat ACTIVE
Role: Director
Appointed on: 15 Jan 2025
Country of Residence: England
Date of birth: February 1968
Address: 10-11, Charterhouse Square, London, EC1M 6EE, England

FINCH, Dean Kendal ACTIVE
Role: Director
Appointed on: 21 May 2021
Country of Residence: England
Date of birth: July 1966
Address: 10-11, Charterhouse Square, London, EC1M 6EE, England

GRADDEN, Amanda Jane ACTIVE
Role: Director
Appointed on: 01 Jun 2026
Country of Residence: England
Date of birth: March 1968
Address: 10-11, Charterhouse Square, London, EC1M 6EE, England

LOWDEN, David Soutar ACTIVE
Role: Director
Appointed on: 19 Oct 2021
Country of Residence: England
Date of birth: August 1957
Address: 10-11, Charterhouse Square, London, EC1M 6EE, England

NG, Wilson ACTIVE
Role: Director
Appointed on: 14 Aug 2025
Country of Residence: England
Date of birth: September 1981
Address: 10-11, Charterhouse Square, London, EC1M 6EE, England

PHYFER, Cheri Marie ACTIVE
Role: Director
Appointed on: 02 Mar 2026
Country of Residence: United States
Date of birth: October 1971
Address: 10-11, Charterhouse Square, London, EC1M 6EE, England

STIPP, Janice Elaine ACTIVE
Role: Director
Appointed on: 17 Jan 2024
Country of Residence: United States
Date of birth: September 1959
Address: 10-11, Charterhouse Square, London, EC1M 6EE, England

THOMSON, Jonathan David ACTIVE
Role: Director
Appointed on: 25 Feb 2019
Country of Residence: England
Date of birth: August 1972
Address: 10-11, Charterhouse Square, London, EC1M 6EE, England

WARD, Jennifer Suzanne ACTIVE
Role: Director
Appointed on: 01 Jun 2023
Country of Residence: England
Date of birth: September 1973
Address: 10-11, Charterhouse Square, London, EC1M 6EE, England

GALLAGHER, Anthony James RESIGNED
Role: Secretary
Appointed on: 21 Sep 2012
Resigned on: 05 May 2020
Address: 12 Charterhouse Square, London, EC1M 6AX

LINGWOOD, Nigel Peter RESIGNED
Role: Secretary
Appointed on: 03 Jul 2001
Resigned on: 21 Sep 2012
Address: 12 Charterhouse Square, London, EC1M 6AX

MORRISON, John RESIGNED
Role: Secretary
Appointed on: 05 May 2020
Resigned on: 30 May 2025
Address: 10-11, Charterhouse Square, London, EC1M 6EE, England

PARKINSON, Andrew Michael Reay RESIGNED
Role: Secretary
Appointed on: 24 Jan 2000
Resigned on: 03 Jul 2001
Address: Tadlow House, Tadlow, Royston, Hertfordshire, SG8 0EL

SWIFT INCORPORATIONS LIMITED RESIGNED
Role: Nominee Secretary
Appointed on: 24 Dec 1999
Resigned on: 24 Jan 2000
Address: 26, Church Street, London, NW8 8EP

CLAYTON, Marie-Louise Louise RESIGNED
Role: Director
Appointed on: 13 Nov 2012
Resigned on: 16 Nov 2015
Country of Residence: England
Date of birth: August 1960
Address: 12 Charterhouse Square, London, EC1M 6AX

DAVIES, Christopher Mark RESIGNED
Role: Director
Appointed on: 01 Nov 2022
Resigned on: 13 Aug 2025
Country of Residence: England
Date of birth: March 1970
Address: 10-11, Charterhouse Square, London, EC1M 6EE, England

GIBBES, Barbara RESIGNED
Role: Director
Appointed on: 22 Jun 2020
Resigned on: 30 Sep 2022
Country of Residence: England
Date of birth: July 1975
Address: 10-11, Charterhouse Square, London, EC1M 6EE, England

GRICE, Ian Michael RESIGNED
Role: Director
Appointed on: 24 Jan 2007
Resigned on: 30 Sep 2013
Country of Residence: United Kingdom
Date of birth: May 1953
Address: 12 Charterhouse Square, London, EC1M 6AX

HENDERSON, John Iain RESIGNED
Role: Director
Appointed on: 21 Feb 2000
Resigned on: 20 Jan 2016
Country of Residence: United Kingdom
Date of birth: January 1956
Address: 12 Charterhouse Square, London, EC1M 6AX

HUSE, Geraldine Claire RESIGNED
Role: Director
Appointed on: 20 Jan 2020
Resigned on: 15 Jul 2026
Country of Residence: England
Date of birth: September 1963
Address: 10-11, Charterhouse Square, London, EC1M 6EE, England

INGRAM, Richard John RESIGNED
Role: Director
Appointed on: 23 Apr 2018
Resigned on: 28 Aug 2018
Country of Residence: United Kingdom
Date of birth: April 1963
Address: 12 Charterhouse Square, London, EC1M 6AX

LINGWOOD, Nigel Peter RESIGNED
Role: Director
Appointed on: 03 Jul 2001
Resigned on: 22 Jun 2020
Country of Residence: England
Date of birth: March 1959
Address: 12 Charterhouse Square, London, EC1M 6AX

MATTHEWS, John Waylett RESIGNED
Role: Director
Appointed on: 24 Jul 2003
Resigned on: 30 Sep 2013
Country of Residence: England
Date of birth: September 1944
Address: 12 Charterhouse Square, London, EC1M 6AX

NICHOLAS, John Edward RESIGNED
Role: Director
Appointed on: 01 Jun 2013
Resigned on: 19 Jan 2022
Country of Residence: Portugal
Date of birth: August 1956
Address: 10-11, Charterhouse Square, London, EC1M 6EE, England

PACKSHAW, Charles Max RESIGNED
Role: Director
Appointed on: 01 Jun 2013
Resigned on: 20 Jan 2021
Country of Residence: England
Date of birth: January 1952
Address: 12 Charterhouse Square, London, EC1M 6AX

PARKINSON, Andrew Michael Reay RESIGNED
Role: Director
Appointed on: 24 Jan 2000
Resigned on: 03 Jul 2001
Date of birth: December 1942
Address: Tadlow House, Tadlow, Royston, Hertfordshire, SG8 0EL

REID, William RESIGNED
Role: Director
Appointed on: 21 Feb 2000
Resigned on: 01 Apr 2003
Date of birth: November 1938
Address: Baykers, Lamb Lane, Sible Hedingham, Halstead, Essex, CO9 3RS

RENNOCKS, John Leonard RESIGNED
Role: Director
Appointed on: 02 Jul 2002
Resigned on: 21 Jan 2015
Country of Residence: United Kingdom
Date of birth: June 1945
Address: 12 Charterhouse Square, London, EC1M 6AX

SMITH, Andrew Patrick RESIGNED
Role: Director
Appointed on: 10 Feb 2015
Resigned on: 16 Jul 2024
Country of Residence: England
Date of birth: September 1960
Address: 10-11, Charterhouse Square, London, EC1M 6EE, England

STEWARTBY, Bernard Harold Ian Halley, Lord RESIGNED
Role: Director
Appointed on: 21 Feb 2000
Resigned on: 10 Jan 2007
Date of birth: August 1935
Address: 20 Balvaird Place, London, SW1V 3SN

THOMAS, Aubrey John Christopher RESIGNED
Role: Director
Appointed on: 21 Feb 2000
Resigned on: 07 Jan 2004
Date of birth: December 1930
Address: Stirtloe House Stirtloe, Huntingdon, Cambridgeshire, PE18 9XW

THOMPSON, Bruce Mckenzie RESIGNED
Role: Director
Appointed on: 24 Jan 2000
Resigned on: 08 May 2018
Country of Residence: England
Date of birth: April 1955
Address: 12 Charterhouse Square, London, EC1M 6AX

THORBURN, Anne RESIGNED
Role: Director
Appointed on: 07 Sep 2015
Resigned on: 30 Sep 2024
Country of Residence: Scotland
Date of birth: July 1960
Address: 10-11, Charterhouse Square, London, EC1M 6EE, England

INSTANT COMPANIES LIMITED RESIGNED
Role: Nominee Director
Appointed on: 24 Dec 1999
Resigned on: 24 Jan 2000
Address: 1, Mitchell Lane, Bristol, Avon, BS1 6BU

SWIFT INCORPORATIONS LIMITED RESIGNED
Role: Nominee Director
Appointed on: 24 Dec 1999
Resigned on: 24 Jan 2000
Address: 26, Church Street, London, NW8 8EP

Filing history

Timeline

People with significant control

Charges

No charges found.

Registers

Exemptions

An exemption explains why the usual people-with-significant-control information may not be held at Companies House. It is not an adverse finding.

Voting shares are traded on a UK regulated market
From
22 December 2018
To
Current
Disclosure Guidance and Transparency Rules chapter 5 applies
From
22 December 2016
To
2 February 2023

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