Theresa is still angry about the day her four-year-old daughter, Siri, was excluded from nursery. 'I'll never forget when I came in the door and saw two members of staff physically restraining her,' she says. 'The more they held her, the more she kicked - and she was hysterical. I didn't care about her kicking them. I didn't care about anything apart from getting Siri out of there.' Siri had been attending...