Catholicism was in England as early as the 3rd or 4th century, so England was very Catholic for 1200-1300 years.
King Henry VIII wanted an annulment of his first marriage. He needed a male heir.
He petitioned the Catholic Church for an annulment. I believe it actually took years before he finally received the answer that his first marriage would not be annulled. At one point, the Pope gave King Henry VIII the title of Defender of the Faith. The king helped defend the Catholic faith against Martin Luther and the beginnings of protestantism. King Henry VIII liked being Catholic and, therefore, in the beginning, the Church of
England, was still very Catholic other than the king proclaimed himself the head of the Church of England and he did not answer to the Pope. to this day, the liturgy of the Episcopal church at least, is very much like the Catholic Mass.
Under Elizabeth I and moreso under Edward VI, the Church of England became more protestant.
The wars between Catholics and Protestants was very bloody. It lasted for about 250 years. Catholics were persecuted once the protestant Anglican faith was firmly in place. You were fined if you did not attend the Anglican service on Sunday. Priests had to sneak into the country and Mass could not be in the open. Priests would be tortured and killed if caught. People who hid priests in their homes would be arrested.
King Henry VIII confiscated all of the properties and buildings, monasteries belonging to the Catholic church and gained great wealth.
In the 1800’s, Catholics were finally able to begin practicing their faith again.