10 Dec, 12:23
Ireland's John Lacey will referee his first ever RBS 6 Nations match in February, while Alain Rolland is also included in the Elite Panel in what is his last season.
Although Munster's preparations have been hindered by injury and national squad obligations, Williams is happy with the way the pre-season is going. " It has been a little difficult with the injuries and guys away but despite that, things have been going well in training. There's a good buzz in the camp and I'm certainly looking forward - and I know everyone is - to Tuesday night when we take on Bristol. It'll be good to get back into the swing of things."
Williams enjoyed a 'six week break', a period that included a holiday in Turkey and the calf injury that curtailed his involvement in the latter stages of the heineken Cup has cleared up.