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The above diagram shows the color scheme of the layout in the main result page. The parent entities and officers who have significant controls over the individuals in focus are always inapplicable. The offspring entities and appointments are those entities that the individuals in focus can influence on.

Clicking the links on parent entities or officers, and offspring entities or managed companies will put them in focus and show upstream or downstream connections. In general, ascendant entities can be found by moving toward upstream, and descendant entities are by toward downstream. In this way, progenitor entities such as grandparent companies (parents of parent), sibling companies (children of parent), partner companies (parents of child), and progeny entities such as grandchild companies (children of child) can be found easily.

Jump to: Offsprings
Parent entities and officers
Inapplicable
parent relation
Individuals in focus

Mayo, John Charles

    Related profiles found in government register
  • Mayo, John Charles
    British born in April 1956

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 20-22, Wenlock Road, London, N1 7GU, England

      IIF 1 IIF 2
  • Mayo, John Charles
    British accountant born in April 1956

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • Suite 10, 25- 27 Heath Street, Hampstead, London, NW3 6TR, England

      IIF 3
  • Mayo, John Charles
    British chartered accountant born in April 1956

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • Leverton House, 13 Bedford Square, London, WC1B 3RA, England

      IIF 4
    • Leverton House, 13 Bedford Square, London, WC1B 3RA, United Kingdom

      IIF 5
  • Mayo, John Charles
    British director born in April 1956

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • Leverton House, 13 Bedford Square, London, WC1B 3RA

      IIF 6 IIF 7
    • Leverton House, 13 Bedford Square, London, WC1B 3RA, United Kingdom

      IIF 8
  • Mr John Charles Mayo
    British born in April 1956

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 20-22, Wenlock Road, London, N1 7GU, England

      IIF 9 IIF 10
  • Mr John Mayo
    British born in April 1956

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • Leverton House, 13 Bedford Square, London, WC1B 3RA, United Kingdom

      IIF 11
  • John Charles Mayo
    British born in April 1956

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 12 Bedford Square, London, Wc1b3ra, United Kingdom

      IIF 12
  • Mayo, John Charles
    British born in April 1956

    Resident in England

    Registered addresses and corresponding companies
    • 201, Bishopsgate, London, EC2M 3AF, United Kingdom

      IIF 13 IIF 14 IIF 15
    • 21-27, Lamb's Conduit Street, London, WC1N 3GS

      IIF 16
  • Mayo, John Charles
    British chartered accountant born in April 1956

    Resident in England

    Registered addresses and corresponding companies
    • 201, Bishopsgate, London, EC2M 3AF, United Kingdom

      IIF 17
    • 4th, Floor Reading Bridge House, George Street, Reading, Berkshire, RG1 8LS, England

      IIF 18
  • Mayo, John Charles
    British company director born in April 1956

    Resident in England

    Registered addresses and corresponding companies
    • 1 Ellerdale Close, Hampstead, London, NW3 6BE

      IIF 19
    • 21-27, Lambs Conduit Street, London, WC1N 3GS, England

      IIF 20
  • Mayo, John Charles
    British deputy chief executive officer born in April 1956

    Resident in England

    Registered addresses and corresponding companies
    • 1 Ellerdale Close, Hampstead, London, NW3 6BE

      IIF 21 IIF 22
  • Mayo, John Charles
    British director born in April 1956

    Resident in England

    Registered addresses and corresponding companies
    • 1 Ellerdale Close, Hampstead, London, NW3 6BE

      IIF 23 IIF 24
    • 201, Bishopsgate, London, EC2M 3AF

      IIF 25 IIF 26
    • 201, Bishopsgate, London, EC2M 3AF, United Kingdom

      IIF 27
    • 88, Wood Street, London, EC2V 7QF

      IIF 28
    • Leverton House, 13 Bedford Square, London, WC1B 3RA

      IIF 29
    • Mayer Brown International Llp, 201 Bishopsgate, London, EC2M 3AF, United Kingdom

      IIF 30 IIF 31
    • Mercury House, Triton Court, 14 Finsbury Square, London, EC2A 1BR

      IIF 32
    • 2, Toomers Wharf, Canal Walk, Newbury, Berkshire, RG14 1DY, England

      IIF 33
  • Mayo, John Charles
    British finance director born in April 1956

    Resident in England

    Registered addresses and corresponding companies
  • Mayo, John Charles
    British investment banker born in April 1956

    Resident in England

    Registered addresses and corresponding companies
    • 1 Ellerdale Close, Hampstead, London, NW3 6BE

      IIF 42
  • Mayo, John Charles
    born in April 1956

    Resident in England

    Registered addresses and corresponding companies
    • 201, Bishopsgate, London, EC2M 3AF, United Kingdom

      IIF 43 IIF 44
    • 21-27, Lamb's Conduit Street, London, WC1N 3GS

      IIF 45
    • 21-27, Lambs Conduit Street, London, WC1N 3GS, England

      IIF 46
  • Mayo, John Charles
    British investor and company director

    Registered addresses and corresponding companies
    • 201, Bishopsgate, London, EC2M 3AF, United Kingdom

      IIF 47
  • Mr John Charles Mayo
    British born in April 1956

    Resident in England

    Registered addresses and corresponding companies
    • Leverton House, 13 Bedford Square, London, WC1B 3RA, England

      IIF 48
  • Mr John Charles Mayo Cbe
    British born in April 1956

    Resident in England

    Registered addresses and corresponding companies
    • 21-27, Lamb's Conduit Street, London, WC1N 3GS

      IIF 49 IIF 50
child relation
Offspring entities and appointments 42
  • 1
    ADBOX INTERNATIONAL LIMITED
    - now 04288675
    CHINA CALL LIMITED
    - 2016-04-02 04288675
    THE SCHOOL ENTERPRISE FRANCHISEE LIMITED
    - 2009-02-17 04288675
    S A COMMUNICATIONS LTD
    - 2008-06-18 04288675
    MAYO & CO. LIMITED
    - 2004-05-19 04288675 04288672
    MANN MANAGEMENT LIMITED
    - 2003-04-18 04288675
    109 Swan Street, Sileby, Loughborough, Leicestershire
    Dissolved Corporate (6 parents)
    Officer
    2001-09-17 ~ dissolved
    IIF 6 - Director → ME
  • 2
    AGILISYS CONTACT SERVICES LIMITED - now
    C0NTACT PARTNERS LIMITED
    - 2006-03-06 04288680
    ELLERDALE NO. 1 LIMITED
    - 2003-04-18 04288680 04288672
    Scale Space Imperial College White City Campus, 58 Wood Lane, London, United Kingdom
    Active Corporate (26 parents)
    Officer
    2001-09-17 ~ 2004-07-23
    IIF 23 - Director → ME
  • 3
    AH ANIMAL HEALTHCARE LIMITED - now
    CANTAB BIOPHARMACEUTICALS LIMITED
    - 2020-05-19 06004833 02673800... (more)
    CAMBRIDGE BIOMANUFACTURING LIMITED
    - 2009-09-29 06004833
    XENOVA BIOMANUFACTURING LIMITED
    - 2007-01-10 06004833
    4th Floor Phoenix House, 1 Station Hill, Reading, Berkshire, United Kingdom
    Dissolved Corporate (11 parents)
    Officer
    2006-11-21 ~ 2017-05-29
    IIF 29 - Director → ME
  • 4
    ASCENSION HEALTHCARE DEVELOPMENT LIMITED - now
    CANTAB ANTI-INFECTIVES LIMITED
    - 2019-01-16 08217622
    4th Floor Phoenix House, 1 Station Hill, Reading, Berkshire, United Kingdom
    In Administration Corporate (6 parents)
    Officer
    2012-09-17 ~ 2017-05-29
    IIF 14 - Director → ME
  • 5
    ASCENSION HEALTHCARE PLC - now
    PRO BONO BIO PLC
    - 2019-01-04 08705972 11715935... (more)
    C/o Alixpartners Uk Llp, 6 New Street Square, London
    In Administration Corporate (20 parents, 4 offsprings)
    Officer
    2013-09-25 ~ 2017-05-29
    IIF 13 - Director → ME
  • 6
    ASTRAZENECA PLC - now
    ZENECA GROUP PLC
    - 1999-04-05 02723534
    HACKPLIMCO (NO. FIVE) PUBLIC LIMITED COMPANY
    - 1993-02-16 02723534
    ICI BIOSCIENCE PLC - 1992-09-25
    HACKPLIMCO (NO.FIVE) PUBLIC LIMITED COMPANY - 1992-07-13
    1 Francis Crick Avenue, Cambridge Biomedical Campus, Cambridge, United Kingdom
    Active Corporate (67 parents, 2 offsprings)
    Officer
    1993-02-15 ~ 1997-10-01
    IIF 36 - Director → ME
  • 7
    BEDFORD ROYALTIES LTD
    - now 07754391
    PRO BONO BIO ROYALTIES BOX LIMITED
    - 2013-05-20 07754391
    PRO BONO BIO LIMITED
    - 2011-11-22 07754391 11715935... (more)
    4th Floor Reading Bridge House, George Street, Reading, Berkshire
    Dissolved Corporate (5 parents)
    Officer
    2011-08-26 ~ dissolved
    IIF 18 - Director → ME
  • 8
    BEEHIVE ART FUNDING LIMITED
    - now 08142348
    BEEHIVE INNOVATIONS LTD
    - 2014-09-08 08142348
    Greenfield Recovery Limited, 28-30 Blucher Street, Birmingham
    Dissolved Corporate (6 parents)
    Officer
    2012-07-13 ~ dissolved
    IIF 4 - Director → ME
    Person with significant control
    2016-04-06 ~ dissolved
    IIF 48 - Ownership of voting rights - More than 50% but less than 75% OE
    IIF 48 - Ownership of shares – More than 50% but less than 75% OE
  • 9
    BEEHIVE CAPITAL LLP
    - now OC303451
    THE STRATEGIC FINANCIAL ADVICE COMPANY LLP
    - 2006-12-07 OC303451
    21-27 Lamb's Conduit Street, London
    Active Corporate (2 parents, 4 offsprings)
    Officer
    2002-11-27 ~ now
    IIF 45 - LLP Designated Member → ME
    Person with significant control
    2016-04-06 ~ now
    IIF 50 - Right to surplus assets - 75% or more OE
    IIF 50 - Ownership of voting rights - 75% or more OE
  • 10
    BUZZ (HOLDINGS) LLP
    OC380535
    4th Floor, Reading Bridge House George Street, Reading, Berkshire
    Dissolved Corporate (7 parents)
    Officer
    2012-11-27 ~ dissolved
    IIF 43 - LLP Designated Member → ME
  • 11
    CELTIC PHARMA DEVELOPMENT SERVICES EUROPE LIMITED
    05577228
    4th Floor Reading Bridge House, George Street, Reading, Berkshire, England
    Dissolved Corporate (7 parents)
    Officer
    2005-10-11 ~ dissolved
    IIF 31 - Director → ME
  • 12
    CELTIC PHARMA DEVELOPMENT UK PLC
    05481475
    First Floor, 1 East Poultry Avenue, London
    Dissolved Corporate (3 parents)
    Officer
    2005-06-15 ~ dissolved
    IIF 27 - Director → ME
    2005-06-15 ~ dissolved
    IIF 47 - Secretary → ME
  • 13
    CELTIC PHARMA HOLDINGS ADVISORS LLP
    OC336567 OC357139
    21-27 Lambs Conduit Street, London, England
    Active Corporate (21 parents)
    Officer
    2023-01-01 ~ 2024-03-31
    IIF 46 - LLP Designated Member → ME
  • 14
    CELTIC PHARMA MANAGEMENT SERVICES EUROPE LIMITED
    05577225
    4th Floor Reading Bridge House, George Street, Reading, Berkshire, England
    Dissolved Corporate (5 parents)
    Officer
    2005-10-11 ~ dissolved
    IIF 30 - Director → ME
  • 15
    CUMBERLAND INITIATIVE LIMITED
    09815017
    2 Toomers Wharf, Canal Walk, Newbury, Berkshire, England
    Dissolved Corporate (8 parents)
    Officer
    2018-12-14 ~ 2023-10-18
    IIF 33 - Director → ME
  • 16
    DISCERNA LIMITED
    - now 04144764
    EVER 1484 LIMITED - 2001-06-12
    Pem Salisbury House, Station Road, Cambridge
    Dissolved Corporate (17 parents)
    Officer
    2005-08-31 ~ 2006-07-28
    IIF 32 - Director → ME
  • 17
    GENERAL DOMESTIC APPLIANCES HOLDINGS LIMITED
    - now 00610606
    GENERAL DOMESTIC APPLIANCES LIMITED
    - 1998-04-01 00610606 NF003696... (more)
    HOTPOINT LIMITED - 1990-03-30
    BRITISH DOMESTIC APPLIANCES LIMITED - 1975-05-15
    A. E. I. APPLIANCES LIMITED - 1966-06-29
    THE HOTPOINT ELECTRIC APPLIANCE COMPANY LIMITED - 1961-01-30
    Morley Way, Peterborough
    Active Corporate (60 parents, 6 offsprings)
    Officer
    1997-10-22 ~ 2001-04-09
    IIF 39 - Director → ME
  • 18
    HA INVESTORS LIMITED
    - now 04288672
    S. A. INVESTORS LIMITED
    - 2018-09-07 04288672
    ELLERDALE NO. 1 LIMITED
    - 2004-06-22 04288672 04288680
    MAYO & CO. LIMITED
    - 2003-04-18 04288672 04288675
    21-27 Lamb's Conduit Street, London
    Active Corporate (7 parents, 1 offspring)
    Officer
    2001-09-17 ~ now
    IIF 16 - Director → ME
    Person with significant control
    2016-04-06 ~ 2020-11-24
    IIF 49 - Ownership of shares – More than 25% but not more than 50% OE
    IIF 49 - Ownership of voting rights - More than 25% but not more than 50% OE
  • 19
    HJM PROPERTIES LTD
    12502894
    20-22 Wenlock Road, London, England
    Active Corporate (2 parents)
    Officer
    2020-03-06 ~ now
    IIF 2 - Director → ME
    Person with significant control
    2020-03-06 ~ now
    IIF 10 - Has significant influence or control OE
  • 20
    I.C. INSURANCE HOLDINGS LIMITED
    - now 01150046
    IMPKEMIX (NO.5) LIMITED - 1978-12-31
    Deloitte Llp, Po Box 500 2 Hardman Street, Manchester
    Dissolved Corporate (29 parents)
    Officer
    1993-01-14 ~ 1997-09-16
    IIF 40 - Director → ME
  • 21
    KKCJ LTD
    08178605
    4th Floor, Reading Bridge House George Street, Reading, Berkshire
    Dissolved Corporate (2 parents)
    Officer
    2012-08-14 ~ 2016-04-01
    IIF 5 - Director → ME
  • 22
    LONDON INVESTORS LLP
    OC376924
    4th Floor, Reading Bridge House George Street, Reading, Berkshire
    Dissolved Corporate (2 parents)
    Officer
    2012-07-13 ~ dissolved
    IIF 44 - LLP Designated Member → ME
  • 23
    M (2003) PLC - now
    MARCONI PLC
    - 2003-10-21 03846429
    8 Salisbury Square, London
    Dissolved Corporate (26 parents)
    Officer
    1999-10-04 ~ 2001-07-06
    IIF 21 - Director → ME
  • 24
    M (DGP2) LIMITED - now
    MARCONI (DGP2) LIMITED
    - 2006-03-21 03545363 03545378
    GEC (DGP2) LIMITED
    - 2001-02-15 03545363 03545378
    SERTICA LIMITED - 1998-05-20
    Point 3 Haywood Road, Warwick
    Dissolved Corporate (14 parents)
    Officer
    1998-06-05 ~ 2001-07-06
    IIF 22 - Director → ME
  • 25
    NEWCASTLE UNITED LIMITED
    - now 02529667 03281264
    ISSUEBONUS LIMITED - 1990-09-24
    St. James' Park, Newcastle Upon Tyne
    Active Corporate (37 parents, 22 offsprings)
    Officer
    1997-02-27 ~ 1998-05-27
    IIF 24 - Director → ME
  • 26
    OPTIBIO LIMITED
    10782195
    Suite 10 25- 27 Heath Street, Hampstead, London, England
    Dissolved Corporate (2 parents)
    Officer
    2017-05-22 ~ dissolved
    IIF 3 - Director → ME
    Person with significant control
    2017-05-22 ~ dissolved
    IIF 12 - Ownership of voting rights - More than 25% but not more than 50% as a member of a firm OE
    IIF 12 - Ownership of shares – More than 25% but not more than 50% as a member of a firm OE
  • 27
    PENTLAND BRANDS LAKESIDE LIMITED - now
    PENTLAND BRANDS LAKESIDE PLC - 2016-07-07
    PENTLAND BRANDS PLC - 2016-01-12
    PENTLAND BRANDS PLC - 2010-04-07
    PENTLAND GROUP PLC
    - 2002-12-09 SC003935 00793577... (more)
    BERTRAMS INVESTMENT TRUST PLC - 1989-07-31
    BERTRAMS PUBLIC LIMITED COMPANY - 1986-05-16
    115 4th Floor, 115 George Street, Edinburgh
    Active Corporate (34 parents, 1 offspring)
    Officer
    1993-12-08 ~ 1999-11-15
    IIF 19 - Director → ME
  • 28
    PRO BONO BIO ENTREPRENEUR LIMITED
    07805302
    C/o Alixpartners Uk Llp 6, New Street Square, London
    In Administration Corporate (8 parents)
    Officer
    2011-10-11 ~ 2017-05-29
    IIF 15 - Director → ME
  • 29
    PRO BONO BIO GROUP PLC
    07802577
    4th Floor Phoenix House, 1 Station Hill, Reading, Berkshire, United Kingdom
    Liquidation Corporate (10 parents, 1 offspring)
    Officer
    2011-10-07 ~ 2017-05-29
    IIF 17 - Director → ME
  • 30
    R&Q BETA COMPANY PLC - now
    R&Q BETA COMPANY LIMITED - 2018-04-13
    ASTRAZENECA INSURANCE COMPANY LIMITED - 2017-07-03
    ZENECA INSURANCE COMPANY LIMITED
    - 1999-11-19 02881849
    ZENECA UNDERWRITING LIMITED
    - 1994-09-01 02881849
    HACKREMCO (NO.903) LIMITED - 1994-06-29
    71 Fenchurch Street, London, United Kingdom
    Converted / Closed Corporate (28 parents)
    Officer
    1994-06-30 ~ 1997-09-16
    IIF 41 - Director → ME
  • 31
    RELIABLE POWER LTD
    - now 10375998
    MEGHI LTD
    - 2017-09-14 10375998
    21-27 Lambs Conduit Street, London, England
    Dissolved Corporate (3 parents)
    Officer
    2016-09-14 ~ dissolved
    IIF 8 - Director → ME
    Person with significant control
    2016-09-14 ~ dissolved
    IIF 11 - Ownership of shares – 75% or more OE
    IIF 11 - Right to appoint or remove directors OE
    IIF 11 - Ownership of voting rights - 75% or more OE
  • 32
    S.G. SECURITIES U.K. LIMITED - now
    S.G.WARBURG & CO.LIMITED
    - 2003-06-06 00292689
    5 Broadgate, London, United Kingdom
    Active Corporate (214 parents)
    Officer
    ~ 1992-09-25
    IIF 42 - Director → ME
  • 33
    SPM PROPERTIES LTD
    12502888
    20-22 Wenlock Road, London, England
    Active Corporate (2 parents)
    Officer
    2020-03-06 ~ now
    IIF 1 - Director → ME
    Person with significant control
    2020-03-06 ~ now
    IIF 9 - Has significant influence or control OE
  • 34
    SYNGENTA LIMITED - now
    ZENECA LIMITED
    - 2000-11-21 02710846
    ICI BIOSCIENCE LIMITED
    - 1992-11-18 02710846 02723534
    HACKREMCO (NO.757) LIMITED
    - 1992-09-25 02710846 02710842... (more)
    Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire, United Kingdom
    Active Corporate (46 parents)
    Officer
    ~ 1997-10-01
    IIF 34 - Director → ME
  • 35
    TA INVESTORS LIMITED
    - now 06986552
    TREATMENTS DIRECT LIMITED
    - 2015-05-19 06986552
    BEEHIVE GOLD LIMITED
    - 2014-05-21 06986552
    HWD PRECIOUS METALS LTD - 2013-06-12
    SILLAH & ASSOCIATES LIMITED - 2010-01-30
    21-27 Lambs Conduit Street, London, England
    Dissolved Corporate (6 parents)
    Officer
    2013-06-13 ~ dissolved
    IIF 20 - Director → ME
  • 36
    TELENT TECHNOLOGY SERVICES LIMITED - now
    TELENT COMMUNICATIONS LIMITED - 2008-03-03
    MARCONI COMMUNICATIONS LIMITED - 2006-01-24
    GPT LIMITED
    - 1998-09-10 00703317
    GEC PLESSEY TELECOMMUNICATIONS LIMITED - 1991-04-02
    GEC TELECOMMUNICATIONS LIMITED - 1989-04-01
    Abel Smith House, Gunnels Wood Road, Stevenage, England
    Active Corporate (78 parents, 6 offsprings)
    Officer
    1997-11-07 ~ 1998-08-17
    IIF 35 - Director → ME
  • 37
    TUSK CORPORATION HOLDINGS LIMITED - now
    TELENT COMMUNICATIONS HOLDINGS LIMITED - 2025-08-13
    MARCONI COMMUNICATIONS HOLDINGS LIMITED - 2006-03-21
    GPT HOLDINGS LIMITED
    - 1998-12-04 00319092
    PLESSEY TELECOMMUNICATIONS (INTERNATIONAL) LIMITED - 1990-04-17
    PLESSEY MEDITERRANEAN & MIDDLE EAST LIMITED - 1983-05-13
    PLESSEY APPLIED MICROELECTRONICS LIMITED - 1978-12-31
    INTERNATIONAL AUTOMATIC TELEPHONE AND ELECTRIC CO. LIMITED (THE) - 1978-12-31
    4th Floor, 95 Gresham Street, London, England
    Active Corporate (36 parents, 1 offspring)
    Officer
    1997-11-07 ~ 1998-08-17
    IIF 37 - Director → ME
  • 38
    TUSK CORPORATION LIMITED - now
    TELENT LIMITED - 2025-08-13
    TELENT PLC - 2008-03-03
    MARCONI CORPORATION PLC
    - 2006-01-24 00067307
    GENERAL ELECTRIC COMPANY P L C(THE)
    - 2000-03-07 00067307
    GENERAL ELECTRIC COMPANY P. L. C.(THE) - 1985-10-04
    4th Floor, 95 Gresham Street, London, England
    Active Corporate (71 parents, 14 offsprings)
    Officer
    1997-10-01 ~ 2001-01-26
    IIF 38 - Director → ME
  • 39
    VINTAGE ENTERTAINMENT LIMITED
    07168296
    88 Wood Street, London
    Dissolved Corporate (12 parents, 2 offsprings)
    Officer
    2016-11-02 ~ dissolved
    IIF 28 - Director → ME
  • 40
    XENOVA GROUP LIMITED
    - now 02698673
    XENOVA GROUP PLC
    - 2005-09-01 02698673
    TRUSHELFCO (NO.1796) LIMITED - 1992-05-22
    First Floor, 1 East Poultry Avenue, London
    Dissolved Corporate (35 parents)
    Officer
    2005-08-31 ~ dissolved
    IIF 26 - Director → ME
  • 41
    XENOVA LIMITED
    - now 01970244
    INGENUM LIMITED - 1986-10-24
    TWENTY-SIXTH SHELF INVESTMENT COMPANY LIMITED - 1986-02-28
    First Floor, 1 East Poultry Avenue, London
    Dissolved Corporate (29 parents)
    Officer
    2005-09-01 ~ dissolved
    IIF 25 - Director → ME
  • 42
    XENOVA OX - 400 LIMITED
    06426926
    4th Floor Reading Bridge House, George Street, Reading, Berkshire, England
    Dissolved Corporate (5 parents)
    Officer
    2007-11-15 ~ dissolved
    IIF 7 - Director → ME

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Contains public sector information retrieved at 9 February 2026 and licensed under the Open Government Licence v3.0.