Originally Posted by kasumigenx
I am not planning to create a TL about this I am thinking of abandoning some of my TL's because of their boringness.
Well elaborate a bit more on the question, then. Why would Henry VI choose Blanche as his bride? Why would Blanche's father choose Henry VI over the King of Castile? Blanche had already been promised in marriage to Henry IV of Castile, and England had close ties to Castile. I don't think the English would want to upset a potential ally in hopes that their king would marry the heiress of Navarre. An English marriage is probably the most unlikely match for Blanche.
But I agree with Elfwine. You need to have a little more focus if you want people to answer your questions. Provide us with a little more background and maybe some of your own ideas on the POD.