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Invisible PeopleEpisodes

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  1. Episode 5

    5/5In the National Grid control room in Berkshire, staff predict surges in demand.

  2. Episode 4

    4/5Telephone operators keep a 24-hour watch on elderly and vulnerable people.

  3. Episode 3

    3/5Joe visits the Ordnance Survey's headquarters in Southampton.

  4. Episode 2

    2/5Joe Kerr joins the control room of Group 4 Securicor's electronic tagging operation.

  5. Episode 1

    1/5Joe joins the staff at Centrecomm, the control centre managing London's 8,000 buses.