Briwere was the nephew of William Brewer, a baron and political leader during King Henry III of England's minority.
[5] An army of other crusaders accompanied them to the East, although whether they were English or mercenaries recruited on the Continent is unclear.
[5][6] Others, however point out that he is not attested as being in England until April 1231, and maintain that he travelled with des Roches, who dawdled in Italy for a time.
[2] Briwere was also employed by the king on diplomatic missions, going twice to France and also escorting Henry's sister Isabella to her marriage to the Holy Roman Emperor Frederick II in 1235.
[2] Excavations in the quire of Exeter Cathedral in 2023 found a number of stone-lined tombs including one identified as Briwere's.