For Sathnam Sanghera, growing up in Wolverhampton in the eighties was a confusing business. On the one hand, these were the heady days of George Michael mix-tapes, Dallas on TV and, if he was lucky, the occasional Bounty Bar. There was his family, whose strange and often difficult behaviour he took for granted until, at the age of twenty-four, Sathnam made a discovery that changed everything he ever thought he knew about them.