In the second half of the 12th century control of the advowson of St Magnus was disputed between the Abbot of Westminster and the Prior of Bermondsey. The case was resolved in the Curia Regis on 23 April 1182, with the advowson being divided equally between them. Later in the 1180s, on their joint presentation, the Archdeacon of London inducted his nephew as parson. On 14 April 1208, again on the joint presentation of the Abbot of Westminster and the Prior of Bermondsy, the Bishop of London instituted Simon de Valenciis to St Magnus.