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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.

Parent entities and officers
Inapplicable
parent relation
Individuals in focus

Jeffery, William Henry

    Related profiles found in government register
  • Jeffery, William Henry
    British born in September 1970

    Resident in Wales

    Registered addresses and corresponding companies
    • Windmill Hill Business Park, Whitehill Way, Swindon, Wiltshire, SN5 6PB

      IIF 1 IIF 2
    • Windmill Hill Business Park, Whitehill Way, Swindon, Wiltshire, SN5 6PB, England

      IIF 3
  • Jeffery, William Henry
    British station manager born in September 1970

    Resident in Wales

    Registered addresses and corresponding companies
    • Aberthaw Power Station, The Leys, Nr Barry, Vale Of Glamorgan, CF62 4ZW, Wales

      IIF 4
child relation
Offspring entities and appointments
Active 3
  • 1
    RWE GENERATION UK HOLDINGS LIMITED
    - now 03987817
    RWE GENERATION UK HOLDINGS PLC - 2018-10-22
    RWE NPOWER HOLDINGS PLC - 2016-09-01
    RWE INNOGY HOLDINGS PLC - 2004-08-02 06451278
    INNOGY HOLDINGS PLC - 2003-10-01
    HACKPLIMCO (NO.EIGHTY-EIGHT) PUBLIC LIMITED COMPANY - 2000-07-04
    Windmill Hill Business Park, Whitehill Way, Swindon, Wiltshire
    Active Corporate (5 parents)
    Officer
    2021-04-01 ~ now
    IIF 2 - Director → ME
  • 2
    RWE GENERATION UK PLC
    - now 03892782 SC149111
    RWE NPOWER PLC - 2014-07-01
    RWE INNOGY PLC - 2004-08-02
    INNOGY PLC - 2003-10-01 03527866
    NPOWER - 2000-07-20 03653277, 03925068
    Windmill Hill Business Park, Whitehill Way, Swindon, Wiltshire
    Active Corporate (5 parents, 9 offsprings)
    Officer
    2021-04-01 ~ now
    IIF 1 - Director → ME
  • 3
    RWE MARKINCH LIMITED
    - now 06574689
    RWE INNOGY MARKINCH LIMITED - 2016-05-04
    RWE NPOWER RENEWABLES (MARKINCH) LIMITED - 2014-01-31
    RWE NPOWER RENEWABLES (TULLIS RUSSELL) LIMITED - 2009-06-30
    FIFE NESS OFFSHORE WIND FARM LIMITED - 2009-05-01
    GLACIUS NO.2 LIMITED - 2008-10-13 06574673
    Windmill Hill Business Park, Whitehill Way, Swindon, Wiltshire, England
    Active Corporate (5 parents)
    Officer
    2022-10-07 ~ now
    IIF 3 - Director → ME
Ceased 1
  • 1
    RWE MARKINCH LIMITED
    - now 06574689
    RWE INNOGY MARKINCH LIMITED - 2016-05-04
    RWE NPOWER RENEWABLES (MARKINCH) LIMITED - 2014-01-31
    RWE NPOWER RENEWABLES (TULLIS RUSSELL) LIMITED - 2009-06-30
    FIFE NESS OFFSHORE WIND FARM LIMITED - 2009-05-01
    GLACIUS NO.2 LIMITED - 2008-10-13 06574673
    Windmill Hill Business Park, Whitehill Way, Swindon, Wiltshire, England
    Active Corporate (5 parents)
    Officer
    2019-05-01 ~ 2020-04-29
    IIF 4 - Director → ME

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