▁North umb ria ▁initially ▁followed ▁the ▁native ▁church ▁in ▁its ▁calculation ▁of ▁E aster ▁and ▁tons ure ▁but ▁then ▁aligned ▁itself ▁with ▁Can ter bury ▁and ▁Rome ▁at ▁the ▁ 6 6 4 ▁Syn od ▁of ▁Whit by . ▁ ▁Early ▁English ▁Christian ▁documents ▁surv iving ▁from ▁this ▁time ▁include ▁the ▁ 7 th - century ▁ill umin ated ▁Lind isf ar ne ▁G osp els ▁and ▁the ▁historical ▁accounts ▁written ▁by ▁the ▁V ener able ▁B ede . ▁The ▁Irish ▁and ▁Sc ots ▁adopted ▁the ▁Roman ▁practices ▁over ▁the ▁ 7 th ▁& ▁ 8 th ▁centuries ; ▁around ▁ 7 6 8 , ▁" Arch bishop " ▁El f odd ▁of ▁" G w yn ed d " ▁finally ▁convinced ▁the ▁Wel sh ▁to ▁follow , ▁although ▁it ▁was ▁not ▁until ▁after ▁the ▁reign ▁of ▁Bernard ▁that ▁the ▁bishop ▁of ▁St ▁David s ▁was ▁finally ▁comp elled ▁to ▁submit ▁to ▁the ▁authority ▁of ▁Can ter bury ▁and ▁the ▁English ▁church . ▁ ▁Norm ans ▁ ▁Christian ity ▁in ▁post - con quest ▁England ▁was ▁generally ▁separ at ist ▁in ▁character , ▁with ▁the ▁right ▁to ▁appoint ▁b ish ops ▁belonging ▁to ▁the ▁king ▁despite ▁pap al ▁ob jections . ▁ ▁By ▁the ▁ 1 1 th ▁century , ▁the ▁Norm ans ▁had ▁over run ▁England ▁and ▁begun ▁the ▁invasion ▁of ▁Wales . ▁St   O sm und , ▁bishop ▁of ▁Sal is bury , ▁cod ified ▁the ▁Sar um ▁R ite ▁and , ▁by ▁the ▁time ▁of ▁his ▁successor , ▁Roger