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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

Calviou, Michael Colin

    Related profiles found in government register
  • Calviou, Michael Colin
    British director born in March 1969

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • National Grid House, Warwick Technology Park, Gallows Hill, Warwick, CV34 6DA

      IIF 1
  • Calviou, Michael Colin
    British utility executive born in March 1969

    Resident in United Kingdom

    Registered addresses and corresponding companies
    • 1 - 3 Strand, London, WC2N 5EH

      IIF 2
    • 1-3 Strand, London, WC2N 5EH

      IIF 3 IIF 4 IIF 5
    • 109 Rouncil Lane, Kenilworth, Warwickshire, CV8 1FP

      IIF 6
    • 1-3, Strand, London, WC2N 5EH

      IIF 7
child relation
Offspring entities and appointments 7
  • 1
    ENERGY NETWORKS ASSOCIATION LIMITED
    04832301
    4 More London Riverside, London, England
    Active Corporate (99 parents, 1 offspring)
    Officer
    2010-05-01 ~ 2015-10-01
    IIF 1 - Director → ME
  • 2
    LEGAL & GENERAL (CAERUS) LIMITED - now
    AERION FUND MANAGEMENT LIMITED
    - 2015-12-10 02181480
    BG PENSION FUNDS MANAGEMENT LIMITED - 2000-10-23
    BRITISH GAS PENSION FUNDS MANAGEMENT LIMITED - 1997-02-17
    ARROWING LIMITED - 1987-12-15
    30 Finsbury Square, London
    Dissolved Corporate (68 parents)
    Officer
    2009-10-09 ~ 2012-12-03
    IIF 5 - Director → ME
  • 3
    NATIONAL GAS TRANSMISSION PLC - now
    NATIONAL GRID GAS PLC
    - 2023-02-06 02006000 04023840
    TRANSCO PLC - 2005-10-10
    BG TRANSCO PLC - 2000-10-23
    BG PUBLIC LIMITED COMPANY - 1999-12-13
    BRITISH GAS PUBLIC LIMITED COMPANY - 1997-02-17
    National Grid House Warwick Technology Park, Gallows Hill, Warwick
    Active Corporate (111 parents, 6 offsprings)
    Officer
    2014-10-01 ~ 2015-09-24
    IIF 3 - Director → ME
  • 4
    NATIONAL GRID ELECTRICITY TRANSMISSION PLC
    - now 02366977
    NATIONAL GRID COMPANY PLC - 2005-07-26
    THE NATIONAL GRID COMPANY PLC - 2002-10-21
    1 - 3 Strand, London
    Active Corporate (72 parents, 8 offsprings)
    Officer
    2014-10-01 ~ 2015-09-24
    IIF 2 - Director → ME
  • 5
    NATIONAL GRID UK PENSION SCHEME TRUSTEE LIMITED
    06140457
    1st Floor West, Davidson House, Forbury Square, Reading, Berkshire, England
    Active Corporate (68 parents, 8 offsprings)
    Officer
    2007-03-06 ~ 2012-12-03
    IIF 4 - Director → ME
  • 6
    NGET/SPT UPGRADES LIMITED
    - now 07057886
    JV NOMINEES 2009 LIMITED - 2010-01-03
    1-3 Strand, London
    Active Corporate (32 parents)
    Officer
    2012-09-17 ~ 2015-09-16
    IIF 7 - Director → ME
  • 7
    XOSERVE LIMITED
    - now 05046877
    BLACKWATER AGENCY LIMITED - 2004-08-27
    Lansdowne Gate, 65 New Road, Solihull
    Active Corporate (71 parents, 1 offspring)
    Officer
    2006-02-01 ~ 2009-06-01
    IIF 6 - Director → ME

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Contains public sector information retrieved at 5 April 2026 and licensed under the Open Government Licence v3.0.