That Edwin was able to take power not only in his native Deira but also in Bernicia may have been due to his support from Raedwald, to whom he may have remained subject during the early part of his reign.
O feito de que Edwin se fixese co poder, non só da súa terra natal, Deira, senón tamén de Bernicia, puido deberse ao respaldo de Raedwald, de quen probabelmente seguiu sendo súbdito a principios do seu reinado.