A Tory student group has apologised after a video reportedly showed its members singing and dancing to a Nazi marching song. The clip, taken at a chairman's dinner at the University of Warwick Conservatives Association two weeks ago, shows people singing Erika - a song that was used by the armed forces of Nazi Germany. Follow latest updates on the general election The Sunday Times, which obtained the footage, said it shows several members of the association dancing and laughing as the song plays on the sound system. The footage ends after one member sees the camera and says: "Don't...