When the Royalists were defeated at Worcester in September, he helped Charles evade capture; although arrested himself, he managed to escape from the Tower of London and rejoin the court. He was appointed Groom of the Chamber and his wife Mary governess to Princess Henrietta, making them part of a close knit inner circle of royal servants. During the short-lived 1658 alliance between Charles and Spain, Blagge and other exiles served in the army defeated by an Anglo-French army at The Dunes in June.