Sir Geoffroy and his brother Oliver de Bouteville came over to England again in 1215 to assist King John against his rebellious barons. In June of that year King John signed the Magna Carta.
It is beyond the scope of this web page to explain about the extraordinary ramifications of this event. However from our perspective it is fascinating to note that Sir Geoffroy is listed on this document as one of the barons who supported the King, as was his brother Oliver. He would have been about 30 years old at that time. So we know exactly where Sir Geoffroy and his brother Olivier were on that day in 1215.
While de Albini remained at Corfe, the King marched on Christmas morning, 1216, from Nottingham to Langar, near Belvoir Castle, and sent a summons to surrender. Upon this, Nicholas de Albini, one of the baron's sons, and a clerk in orders, delivered the keys to the King, asking only that his father should be mercifully treated. The fortress was then committed to the custody of Geoffrey and Oliver de Buteville.
Source : Vol II File 2: The Paternal Ancestry of Homer Beers James, http://homepages.rootsweb.com/~pmcbride/james/f019.htm