Almost everybody endured police interrogations at some point during the 1970s. They were so frequent that most families had a packed bag by the front door (people were expected to bring a spare change of underwear and their own first-aid supplies).
If by chance all members of a family were summoned together, they might make a day of it, have a picnic in the prison facility's Garden of Incorruptibility and watch the interrogation of their loved ones on big monitors. Laugh tracks were included to minimise distress.
While the security services were openly proud of their slogans such as "we promise to raise a glass to those who don't confess", if a detainee did suffer irreversible psychological or physical damage as a result of their interrogation, the family was awarded a £5 book token and a potted cactus as compensation.
More about Scarfolk Security Services.