Philip
Donor
IOTL, John of Gaunt, invaded Castile in 1386 to press his claim to kingdom. While he was away from England, the Lords Appellant rose up against Richard II. Richard was largely reduced to being a figurehead. In 1389, John returned to England and worked to rebuild Richard's authority. A few years later, Richard was deposed and John's son Henry was crowned Henry IV.
What if John dies during his expedition to Castile? Do the Lords Appellant keep Richard around? Does Richard submit to this or rebel against them? Do they depose Richard and install one of their own, Thomas of Woodstock, the youngest son of Edward III, as king? (Sure, there is still the matter of Edmund Mortimer, but Henry got around that, so I don't see why the Lord Appellant can't.)
What if John dies during his expedition to Castile? Do the Lords Appellant keep Richard around? Does Richard submit to this or rebel against them? Do they depose Richard and install one of their own, Thomas of Woodstock, the youngest son of Edward III, as king? (Sure, there is still the matter of Edmund Mortimer, but Henry got around that, so I don't see why the Lord Appellant can't.)