Slammed: The Seventies – Five things we learned from Wales documentary By Matt LloydBBC Sport Wales Last updated on 1 hour ago1 hour ago.From the section Welsh Rugby They were a trailblazing group of young players that would change rugby forever. The Wales team of the 1970s have long been part of rugby folklore. But what few people remember is just what it took to achieve sporting immortality. With the help of never-seen-before footage and digitally-remastered scenes, a BBC documentary has charted the roots of that success. Here are five things we learned from Slammed: The Seventies, which kicks off…