An account in The Guardian (27 December 2008) discusses how a modern collector had taken a sword thought to be made by the famous smith Ulfberht to the Wallace Collection, where it was found to be a fake. The sword was not of the same high quality as the genuine swords from Ulfberht's forge. This led to further analysis of other swords, and the discovery that many were not of the high quality associated with the Ulfberht swords. Clearly there was a lot of forgery going on.