The Gemmological Association of Great Britain

Active01945780 Private company limited by guarantee
Incorporated
10 September 1985 (41 years)
Previously known as
The Gemmological Association and Gem Testing Laboratory of Great Britain (until 28 June 2007)
Gem Testing Laboratory of Great Britain (until 17 October 1990)
Caseclaim Limited (until 14 January 1986)
Industry
Activities of professional membership organizations (94120)
Directors
Alistair Neil Mccallum
Katie Mckenzie Flitcroft
Pia Pompea Tonna
Accounts type
Group
Region
Greater London
Address
21 Ely Place
London
EC1N 6TD

Filing status

Accounts due
30 September 2027
Last accounts
31 December 2025
Conf. stmt due
15 September 2027
Last conf. stmt
1 September 2026

Charges

Total
2
Outstanding
2
Part satisfied
0
Satisfied
0

Officers 8 active

Officer details are public data from the Companies House register.

Hill, Catherine Elizabeth
Secretary · Appointed 3 February 2025
Mccallum, Alistair Neil
Director · Appointed 25 November 2024
British
Born May 1990 (36)
Flitcroft, Katie Mckenzie
Director · Appointed 26 October 2022
British
Born August 1982 (44)
Tonna, Pia Pompea
Director · Appointed 26 October 2022
British
Born March 1970 (56)
Pedersen, Marguerite Ann Campbell
Director · Appointed 26 October 2022
British
Born December 1945 (80)
Bayoumi - Stefanovic, Nevin Ibrahim Khalil
Director · Appointed 9 January 2019
Danish
Born August 1975 (51)
Director · Appointed 27 July 2017
Also at Joanna Hardy Limited · more companies
British
Born November 1961
Director · Appointed 27 July 2017
Also at Gemmological Instruments Limited, Bridewell Centre Limited, St. Bride Foundation Trust Limited
British
Born August 1953 (73)
Officer history (63 former)
3 February 2025
Appointed Hill, Catherine Elizabeth as Secretary
25 November 2024
Appointed Mccallum, Alistair Neil as Director
13 November 2024
Resigned Carmody, Justine Lynda as Director
26 July 2024
Resigned Hart, Alan David as Secretary
1 March 2023
Resigned Smith, Christopher Patrick as Director
26 October 2022
Appointed Pedersen, Marguerite Ann Campbell as Director
26 October 2022
Appointed Tonna, Pia Pompea as Director
26 October 2022
Resigned Bonanno Patrizzi, Kathryn Leigh as Director
26 October 2022
Appointed Drucker, Richard Barry as Director
26 October 2022
Resigned Drucker, Richard Barry as Director
26 October 2022
Appointed Flitcroft, Katie Mckenzie as Director
26 October 2022
Resigned Goldring, Louise Claire as Director
9 January 2019
Appointed Bayoumi - Stefanovic, Nevin Ibrahim Khalil as Director
9 January 2019
Appointed Goldring, Louise Claire as Director
4 December 2018
Resigned Ogden, John Mullen, Dr as Director
3 December 2018
Resigned Greer, Paul Frank as Director
2 October 2018
Resigned Israel, Nigel Brian as Director
2 October 2018
Resigned Gregory, Kerry Honor as Director
27 November 2017
Resigned Exley, Lesley Margaret as Director
27 July 2017
Appointed Sadler, Philip as Director
27 July 2017
Resigned Slater, Richard Mark as Director
27 July 2017
Resigned Hodgkinson, John Alan William as Director
27 July 2017
Appointed Hardy, Joanna as Director
23 June 2017
Appointed Hart, Alan David as Secretary
10 May 2017
Appointed Exley, Lesley Margaret as Director
9 September 2016
Resigned Burland, Mary Ann as Director
26 July 2016
Resigned Wells, Miranda Elizabeth Jane as Director
26 July 2016
Resigned Wells, Miranda Elizabeth Jane as Secretary
17 February 2016
Resigned Hart, Alan David as Director
26 August 2015
Appointed Bonanno Patrizzi, Kathryn Leigh as Director
26 August 2015
Appointed Ogden, John Mullen, Dr as Director
26 August 2015
Appointed Hodgkinson, John Alan William as Director
26 August 2015
Resigned Cadzow, Jessica May as Director
26 August 2015
Appointed Gregory, Kerry Honor as Director
26 August 2015
Appointed Carmody, Justine Lynda as Director
26 August 2015
Appointed Smith, Christopher Patrick as Director
10 August 2015
Appointed Wells, Miranda Elizabeth Jane as Secretary
10 August 2015
Resigned Riley, James Henry as Secretary
15 July 2015
Resigned Lambert, Jonathan as Director
11 July 2015
Resigned Whittaker, Stephen Peter Lewis as Director
10 July 2015
Resigned Williams, Jason Francis as Director
11 June 2015
Resigned Collins, Steven as Director
19 January 2015
Appointed Hart, Alan David as Director
3 September 2014
Appointed Cadzow, Jessica May as Director
12 June 2014
Appointed Lambert, Jonathan as Director
12 June 2014
Resigned Rankin, Andrew Hugh, Professor as Director
18 November 2013
Resigned Oldershaw, Cally Jane Elizabeth as Director
18 November 2013
Resigned Jackson, Brian as Director
3 July 2013
Appointed Greer, Paul Frank as Director
3 July 2013
Appointed Whittaker, Stephen Peter Lewis as Director
3 July 2013
Appointed Israel, Nigel Brian as Director
17 September 2012
Resigned Ogden, John Mullen, Dr as Secretary
17 September 2012
Appointed Riley, James Henry as Secretary
11 July 2012
Appointed Burland, Mary Ann as Director
11 July 2012
Appointed Rankin, Andrew Hugh, Professor as Director
11 July 2012
Appointed Wells, Miranda Elizabeth Jane as Director
27 April 2012
Appointed Williams, Jason Francis as Director
17 April 2012
Resigned Palmer, Landy as Director
29 March 2012
Resigned Jordan, Steven Leonard as Director
15 March 2012
Resigned Riley, James Henry as Director
7 July 2011
Resigned Collins, Alan Trevor, Professor as Director
8 November 2010
Appointed Palmer, Landy as Director
8 November 2010
Appointed Jordan, Steven Leonard as Director
5 September 2010
Resigned Williams, Jason Francis as Director
5 September 2010
Resigned Stern, Evelyne as Director
15 December 2009
Appointed Slater, Richard Mark as Director
22 June 2009
Appointed Collins, Steven as Director
22 June 2009
Appointed Oldershaw, Cally Jane Elizabeth as Director
22 June 2009
Appointed Jackson, Brian as Director
26 February 2009
Resigned Neale, Paul Christopher as Secretary
26 February 2009
Appointed Ogden, John Mullen, Dr as Secretary
1 July 2008
Resigned Davidson, Terence Malcolm John as Director
30 June 2008
Resigned O'Donoghue, Michael John as Director
27 May 2008
Appointed Neale, Paul Christopher as Secretary
8 April 2008
Resigned Throgmorton Secretaries LLP as Corporate Secretary
17 October 2007
Resigned Everitt, Sally Ann as Director
16 July 2007
Appointed Throgmorton Secretaries LLP as Corporate Secretary
16 July 2007
Resigned Throgmorton UK Limited as Corporate Secretary
18 June 2007
Resigned Burgoyne, Sheila as Director
16 May 2007
Resigned Wates, Peter John as Director
21 March 2007
Appointed Williams, Jason Francis as Director
17 January 2007
Appointed Riley, James Henry as Director
8 November 2006
Resigned Mccallum, Marcus Alexander as Director
27 June 2006
Resigned Jobbins, Edward Allan as Director
12 April 2006
Resigned Barthaud, Paul Alexander as Director
16 November 2005
Appointed Barthaud, Paul Alexander as Director
11 October 2005
Resigned Hudson, Lawrence as Director
11 September 2005
Appointed Mccallum, Marcus Alexander as Director
22 June 2005
Resigned Monnickendam, Jeffrey as Director
26 May 2005
Resigned Watson, Vivian Peter as Director
1 April 2005
Resigned Harding, Roger, Dr as Secretary
1 April 2005
Appointed Throgmorton UK Limited as Corporate Secretary
9 November 2004
Resigned Mercer, Ian Frederick as Director
9 November 2004
Resigned Harding, Roger, Dr as Director
14 September 2004
Appointed Burgoyne, Sheila as Director
14 September 2004
Appointed Jobbins, Edward Allan as Director
14 September 2004
Appointed Collins, Alan Trevor, Professor as Director
14 September 2004
Resigned Thomson, Ian as Director
14 September 2004
Appointed Everitt, Sally Ann as Director
14 September 2004
Appointed Wates, Peter John as Director
9 September 2003
Appointed Hudson, Lawrence as Director
22 November 2001
Resigned Van Doren, Jean-Paul as Director
14 July 2001
Resigned Deeks, Noel as Director
11 July 2001
Resigned Van Doren, Jean-Paul as Secretary
11 July 2001
Appointed Harding, Roger, Dr as Secretary
26 April 2001
Resigned Harding, Roger, Dr as Secretary
20 December 2000
Appointed Van Doren, Jean-Paul as Director
20 December 2000
Appointed Van Doren, Jean-Paul as Secretary
19 May 1999
Appointed Mercer, Ian Frederick as Director
21 April 1999
Appointed Stern, Evelyne as Director
21 April 1999
Appointed Monnickendam, Jeffrey as Director
26 January 1999
Resigned Cavey, Christopher Ronald as Director
24 September 1998
Appointed O'Donoghue, Michael John as Director
24 May 1995
Resigned Emms, Eric Charles as Director
13 June 1994
Resigned Klein, Adrian Henry as Secretary
13 June 1994
Appointed Harding, Roger, Dr as Secretary
8 September 1993
Resigned Jobbins, Edward Allan as Director
8 September 1993
Appointed Emms, Eric Charles as Director
14 June 1993
Resigned Callaghan, David John as Director
26 December 1992
20 November 1991
Appointed Cavey, Christopher Ronald as Director
4 November 1991
Resigned Deeks, Noel as Director
4 November 1991
Resigned Israel, Nigel Brian as Director

Ownership 0 active

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

The company has declared that it has no person with significant control.

Holdings 1

Companies where The Gemmological Association of Great Britain is registered as a person with significant control

Owns 75–100% of shares
Active
Former controllers (11)
31 August 2017
Ceased Justine Lynda Carmody — Has significant influence or control
31 August 2017
Ceased Kathryn Leigh Bonanno Patrizzi — Has significant influence or control
31 August 2017
Ceased Christopher Patrick Smith — Has significant influence or control
31 August 2017
Ceased John Mullen Ogden — Has significant influence or control
31 August 2017
Ceased Kerry Honor Gregory — Has significant influence or control
31 August 2017
Ceased Mary Ann Burland — Has significant influence or control
31 August 2017
Ceased John Alan William Hodgkinson — Has significant influence or control
31 August 2017
Ceased Richard Mark Slater — Has significant influence or control
31 August 2017
Ceased Miranda Elizabeth Jane Wells — Has significant influence or control
31 August 2017
Ceased Paul Frank Greer — Has significant influence or control
31 August 2017
Ceased Nigel Brian Israel — Has significant influence or control

What The Gemmological Association Of Great Britain say about themselves

“Creating and supporting gemmologists since 1908. Study gemmology and diamonds with the oldest gem & jewellery education provider in the world”

— from gem-a.com

Filings

Recent filings only. See the full history on Companies House

DateDescriptionMade Up ToPagesPDF
17 September 2026Confirmation statement with no updates1 September 2026
9 August 2026Group of companies' accounts31 December 2025
11 September 2025Confirmation statement with no updates10 September 2025
9 July 2025Group of companies' accounts31 December 2024
5 June 2025Director's details changed
Show all recent filings

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