IRB U21 Rugby World Cup
It was born as a tournament among the junior teams of SANZAR nations and Argentina. In 1998 England was invited and since 1999 the tournament was extended to major european and pacific nations. In 2002 it was officially sanctioned by IRB. In 2008 it was merged with IRB U19 Rugby World Cup to form the new IRB Junior Rugby World Championship.
en.wikipedia.org/wiki/Under_21_Rugby_World_Championship - Wikipedia pages about U21 Rugby World Championship
Moreover, the site www.irbu21.com was scanned using web.archive.org