Williams was shown a red card by referee, John Lacey, in the 24th minute of the Cardiff Blues v Montpelier match for an alleged dangerous tackle on the Montpellier scrum half, Benoit Paillaugue
The Blues scrum half will now travel to Dublin on Thursday for the hearing. Jeremy Summers (England) has been appointed as the independent Judicial Officer for the hearing. The decision will be communicated in advance of this weekend's Round 4 matches.
Supporters who have purchased tickets and are travelling to the European Rugby Challenge Cup clash with London Irish at the Madejski Stadium on Saturday (kick-off 3pm) are advised that some seating has now been changed for this fixture.
Supporters are advised that we will selling tickets right up until kick-off for the big home European Rugby Challenge Cup clash with London Irish - so don't miss all the action this Saturday at BT Sport Cardiff Arms Park.
Blues Rugby Camps will be back this February to given children right across our region the opportunity to participate in rugby during the holidays - and you can book NOW to avoid any disappointment and get the ideal Christmas gift for the aspiring young rugby player in your life!