 Blagge was the earl's senior by a few years and was not afraid to rebuke him for his erratic behaviour – a fact noted by Millicent Arundel, a witness before the Privy Council when, in March 1543, it investigated and punished Surrey's and Thomas Wyatt the Younger's rioting in London, which involved shooting in the streets as well as glass breaking.In July of that year English forces under Sir John Wallop were sent to support Imperial forces in defence of the Low Countries on the northern front of the Italian War of 1542–1546, moving out of the Pale of Calais.Blagge accompanied Surrey, taking 12 infantry from Kent on the expedition.