The two kings maintained a friendly relationship, meeting in 1206 and 1207, until it was rumoured in 1209 that William was intending to ally himself with Philip II of France.
Os dous monarcas mantiveron unha relación amistosa, reuníndose en 1206 e 1207, ata que en 1209 xurdiron rumores de que Guillerme trataba de aliarse con Filipe II de Francia.