It seems like frames of Asian origin came into the Raleigh Line about the same time as the Rampar designation. This was, I think, 1977. There were also Dutch built bikes in the line earlier. Did they have the barred head badge? If so, this could be one of the Dutch ones; otherwise, the frame probably doesn't predate 1977 at the earliest (unless the head badge is not original, as Charles Wahl says).