This article deals with the fate of a group of heretics that settled in England during the reign of Henry II Plantagenet. They were sentenced at a synod in Oxford in the middle of the 60s of 12th c. The author finds the proper place of the trial against them exalting some of the contemporary hypotheses about the heretical movements by new reasons and arguments. He defends the idea that those heretics were a part of the developing catharism in the triangle marked by Rhineland, Cologne and Flanders. Being an island country ruled by strong kings, for quite a long time England remained “immune” against the “pestilence” of the century. The heresy thrived only where feudal separatism dominated and led to the famous Albigensian Wars in the beginning of 13th c.