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.
Cardiff Blues tackle Munster in the Guinness PRO12 at BT Sport Cardiff Arms Park on Saturday, November 1 (kick-off 5.15pm) - and it will be 'A Day to Remember' as we pay tribute to all the Armed Forces and our respects ahead of Remembrance Sunday!
Leaders of Rugby honoured the memory of former Scarlets and Regional Rugby Chief Executive Gallacher last night after it was announced he had been awarded the Outstanding Contribution to Rugby at Rugby Expo Awards.