Original: Yet before the duel could take place, Richard II instead decided to banish Henry from the kingdom (with the approval of Henry's father, John of Gaunt) to avoid further bloodshed. Mowbray himself was exiled for life.
Simplified: King Richard ordered Henry to live outside England for ten years (with the approval of Henry's father, John of Gaunt) but Thomas de Mowbray was exiled from England for life.