Since Alfonso V of Aragon wanted to divorce his barren wife Maria of Castile, what if he manages to break with the Catholic Church in order to marry another woman, he wanted to marry another woman in OTL.
Not to put too fina a point about it, Henry VIII did not have a huge land border wiht his wife's family kingdom, and Spain lacked traditional claims on England.
Alfonfo V is asking for a Castillian invasion and annexation, with Papal blessing.
What does that have to do with anything related to OP?