Edward VI (1537-1553) never really reigned since he died at the age of 15, but he was educated as a Protestant. The "Protectors" who ruled the country on his behalf passed several laws, with his agreement, that in practical terms transformed the Anglican church into a Protestant church.
Saints' statues and images were removed from public places and churches, whose walls were painted white. Priest's robes became more simple and they were allowed to marry.
The typical Latin Mass was abolished and a Bible translated to English was published and distributed by Protestant missionaries.
All of these changes went against basical Catholic principles such as: celibacy of the clergy; the luxury of the clergy and of the Church's habits; the Mass should be celebrated in Latin; the worship of saints.
