Interesting post, but the piece ignores the fact that the Christian Church thrived in Britain centuries before St. Augustine. Two British bishops (representing hundreds of others) were at the Council of Arles in 314 AD. Britain's Promartyr, St. Alban, is generally believed to have been martyred in 209 AD.
And for the diehard romantics, there's always that legend about St. Joseph of Arimathea establishing the Church in Glastonbury just a few years after the Ascension...
This article does not ignore the Celtic Church:
Thus ended the nearly five-hundred-year history of the Anglo-Saxon Orthodox Church, which was followed by the demise of the still older Celtic Orthodox Churches in Wales, Scotland and Ireland. Also check out the link to the revived Celtic Orthodox Church: