Oh wow! IIRC from the interviews the way she meets these families is through a Facebook group she runs or something like that, so maybe that's it.
Maybe it was just my experience but the UK scene seems quite tight knight, thank God, only through the Walsingham pilgrimage and the English chapter in Nuestra Señora de la Cristiandad I met Joseph Shaw, a few of the Marian Franciscans, Stronsay monks and a few laypeople that went to both.
Yes I met Joseph Shaw, Good chap. have attended LMS masses. Latin Mass Society.