London Irish have invited Heineken Cup organisers to investigate an alleged incident of racial abuse during last Friday's match against Ulster.
London Irish player Delon Armitage claims to have been abused by an opposition player, whose identity has not been revealed, after the the match at Ravenhill in Belfast.
Since the match, London Irish claim to have received a formal apology from an Ulster player for what the Madejski Stadium-based club describe as 'foul and abusive language'.
In a statement, they said: 'London Irish has forwarded its version of events to ERC, the tournament organisers, and awaits their response.'
