Due to the dismissal of Roger de Leybourne from the service of Lord Edward in 1262, he joined with several other nobles of the baronial opposition under Simon de Montfort, Earl of Leicester.
In June 1263, he was one of the nobles who arrested Peter of Aigueblanche, Bishop of Hereford.
[4] Vaux returned to royal service (to both King Henry III and Lord Edward), by October 1263; he was one of the witnesses of the agreement between Henry and King Louis IX of France in December 1263.
Vaux fought on the side of King Henry III during the battle of Evesham in August 1265 and received grants of some of the rebel barons seized houses in London.
Vaux was appointed as Sheriff of Norfolk and Suffolk and Governor of Norwich Castle; however, in 1285 he owed the crown over £213.