*** In the second of this three-part series, George Alagiah tells the story of the GI babies labelled war casualties, the boom in mixed-race couples following mass migration and how sixties trendsetters crossed the racial divide. *** www.bbc.co.uk/news/magazine-15019672 www.bbc.co.uk/news/uk-15164970 www.bbc.co.uk/news/magazine-15173435