Michael Davies was president of Una Voca, which is not a traditional Mass group, but rather, a group that calls for the Mass to be in Latin. So, Una Voce, unless they have changed, is in favor of the Novus Ordo in Latin or the traditional Mass. It just happens that, if you want the Mass to be in Latin, it seems to be easier to get the traditional Mass.
He attended the traditional Mass when it was available to him, but I never heard that he refused to attend the Novus Ordo if that was all that is available to him. I would agree with the seminarian Matthew quoted.
Mr. Davies died in 2004. I wonder what he would think of the state of the Conciliar church today.