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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

Barker, John Kirk

    Related profiles found in government register
  • Barker, John Kirk
    British born in February 1948

    Registered addresses and corresponding companies
    • C/o Isotron Plc, Moray Road Elgin Industrial Estate, Swindon, Wiltshire, SN2 8XS

      IIF 1
  • Barker, John Kirk
    British company director born in February 1948

    Registered addresses and corresponding companies
  • Barker, John Kirk
    British director born in February 1948

    Registered addresses and corresponding companies
    • Isotron Plc, Apple Walk Kembrey Park, Swindon, SN2 6BA

      IIF 7
    • Isotron Plc, Elgin Industrial Estate, Swindon, Wiltshire, SN2 8XS

      IIF 8
  • Barker, John Kirk
    English director born in February 1948

    Resident in England

    Registered addresses and corresponding companies
    • Field House, Cranham, Gloucester, GL4 8HB

      IIF 9
  • Barker, John Kirk
    English retired born in February 1948

    Resident in England

    Registered addresses and corresponding companies
    • Headway House, Pullman Court, Off Great Western Road, Gloucester, Gloucestershire, GL1 3EP, England

      IIF 10
child relation
Offspring entities and appointments 10
  • 1
    DRUG TEST LIMITED
    - now 01164239
    GAMMA LABORATORIES LIMITED
    - 2005-10-17 01164239
    Ground Floor Stella, Windmill Hill Business Park, Whitehill Way Swindon, Wilts
    Dissolved Corporate (9 parents)
    Officer
    ~ 2007-03-31
    IIF 3 - Director → ME
  • 2
    EBIS IOTRON LIMITED
    - now 04099936
    IOTRON EBIS INDUSTRIES UK LIMITED - 2001-04-25
    SEVCO 1210 LIMITED - 2000-11-09
    Ground Floor Stella, Windmill Hill Business Park, Whitehill Way Swindon, Wilts
    Dissolved Corporate (17 parents)
    Officer
    2005-09-01 ~ 2007-03-31
    IIF 8 - Director → ME
  • 3
    GAMMA RADIATION SERVICES LIMITED
    00956504
    Ground Floor Stella, Windmill Hill Business Park, Whitehill Way Swindon, Wilts
    Dissolved Corporate (8 parents)
    Officer
    ~ 2007-03-31
    IIF 4 - Director → ME
  • 4
    HEADWAY COTSWOLD TRUST LIMITED
    02274966
    Headway House Pullman Court, Off Great Western Road, Gloucester, Gloucestershire
    Active Corporate (48 parents)
    Officer
    2010-05-10 ~ 2015-09-29
    IIF 10 - Director → ME
  • 5
    IRRADIATED PRODUCTS LIMITED
    00920492
    Ground Floor Stella, Windmill Hill Business Park, Whitehill Way Swindon, Wilts
    Dissolved Corporate (8 parents)
    Officer
    ~ 2007-03-31
    IIF 6 - Director → ME
  • 6
    OPALCO LIMITED
    06829612
    Field House, Cranham
    Dissolved Corporate (2 parents)
    Officer
    2009-02-25 ~ dissolved
    IIF 9 - Director → ME
  • 7
    SEREN LABORATORY SERVICES LIMITED - now
    SYNLAB LABORATORY SERVICES LIMITED - 2026-03-06
    SYNERGY HEALTH LABORATORY SERVICES LIMITED - 2017-05-02
    JMJ LABORATORIES LIMITED
    - 2009-05-15 03216065 00361625
    WARRIOR DESIGNS LIMITED
    - 1996-08-13 03216065
    Unit G1 I54 Business Park, Valiant Way, Wolverhampton, Staffordshire, England
    Active Corporate (31 parents, 1 offspring)
    Officer
    1996-07-31 ~ 2007-03-31
    IIF 1 - Director → ME
  • 8
    SYNERGY HEALTH INVESTMENTS LIMITED - now
    ISOTRON INVESTMENTS LIMITED
    - 2011-11-18 01507384
    FOOD IRRADIATION SERVICES LIMITED
    - 2001-12-14 01507384
    SUPER GRADE ONION COMPANY LIMITED
    - 1982-12-13 01507384
    2200 Renaissance, Basing View, Basingstoke, Hampshire, England
    Active Corporate (16 parents)
    Officer
    ~ 2007-03-31
    IIF 5 - Director → ME
  • 9
    SYNERGY HEALTH STERILISATION UK LIMITED - now
    ISOTRON LIMITED - 2011-12-01
    ISOTRON PUBLIC LIMITED COMPANY
    - 2007-12-07 01771333
    BRICKTRIM LIMITED
    - 1983-12-22 01771333
    2200 Renaissance, Basing View, Basingstoke, Hampshire, England
    Active Corporate (29 parents, 1 offspring)
    Officer
    ~ 2007-03-31
    IIF 2 - Director → ME
  • 10
    WILLIAMS MEDICAL SUPPLIES LIMITED
    - now 04240054
    WILLIAMS MEDICAL SUPPLIES PLC
    - 2007-05-17 04240054
    Craiglas House, Maerdy Industrial Estate, Rhymney, Tredegar, Gwent
    Active Corporate (22 parents, 7 offsprings)
    Officer
    2005-09-29 ~ 2007-05-22
    IIF 7 - Director → ME

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Contains public sector information retrieved at 22 March 2026 and licensed under the Open Government Licence v3.0.