Speaking of the decision Cardiff Blues Chief Executive Richard Holland said:
"Playing the Connacht and Ulster matches at the Arms Park has proved to be a very constructive exercise and certainly answers a lot of questions for us going forward."
"We are fortunate that we are able to play matches at both grounds which offer us different facilities for the whole spectrum of our support."
"We had a crowd of 22,000 for the Ospreys and 14,000 for the Scarlets last season and the maximum capacity at the Arms Park would be 12,000."
"Therefore it makes sense for us to play these matches back at the Cardiff City Stadium which is our home and a fantastic facility."
"We still have 17years of our 20 year lease in place at the Cardiff City Stadium, however, we have listened to our supporters and played these two matches at the Arms Park."
"Obviously we now have a clearer picture of the possibilities for the 2012/13 season if we decide to play some of our matches around the region."