Guala Bicchieri arrived in England in the midst of the baronial rebellion, when rebel barons were attempting to force John from the throne and when the suspension and exile of archbishop Stephen Langton had left the English church without a leader. Bicchieri was a supporter of King John in the struggle against the barons and their candidate for the English crown, Louis of France. As the Pope’s nuncio, Guala Bicchieri played an important role in stabilizing the English church in the aftermath of this civil war now known as the First Barons’ War. He was instrumental in the reissuing of "Magna Carta".