Despite new figures showing that more of us than ever are opting to have one child, prejudices about ‘only’ children still abound, says broadcaster Jo Elvin , who is very happy with her family of three W hen you think about it,” said a work colleague I barely knew, “What you’re doing is a form of child abuse . I really believe that.” The abuse she was referring to? That my daughter , Evie, was an only child . Apparently, if she had her way, my failure to produce her a sibling would have me put