But he failed—England left (thank God) the RCC and he was the “prophet” not without honor save in his own country” as the saying goes—and if he had not been martyred Catholicism may have stayed in England and America today would have started out a maladroit proto basket republic like so many other colonies established by the RCC.
England has abandoned Christianity, period. We're eagerly trying to follow them.
Nevertheless, amongst the faithful remnant, Catholicism is now the largest Christian religion in England as measured by Sunday church attendance. I hear Islam is doing rather well, also.