Billy Vunipola has explained what his recent enrollment at tackle school did for his game. The England No8 was red-carded on August 19 for his shoulder-to-head collision with Ireland’s Andrew Porter in Dublin. Billy Vunipola has explained what his recent enrollment at tackle school did for his game. The England No8 was red-carded on August 19 for his shoulder-to-head collision with Ireland’s Andrew Porter in Dublin.