This would not be such big news if it wasn't for the actions of the Americans in Abu Ghraib and Gitmo - the more feverish elements in the press have been digging for a 'British Abu Grhaib' for a long time.
It's interesting to note that
a) the NOTW said it has had this video for 'sometime' and (b) they paid their source for it. The latter IMO simply encourages others.