Anglo-Portuguese Union

http://www.youtube.com/watch?v=4v5mkcBeKHo
This is my video for you to get the idea of how will the TL look like..
Anglo-Portuguese Union
POD
Richard II escapes from his Castle and flees to France with his wife, Isabella of Valois, after that King Henry IV becomes the illegitemate King of England, Richard II sires a daughter to Isabella of Valois in year 1400 named Marie who marries Duarte Avis of Portugal in 1415 thus Duarte Avis gets a claim to the throne of England.
 
Isabella's eleventh birthday was on 9th November 1400. I suggest that she was unlikely to have had a child that year. Further, she was naturally not imprisoned with her husband so it is hard to see him escaping with her. Duarte of Portugal was the nephew of Henry IV, his mother Philippa of Lancaster being Henry's full sister. I would imagine then that relations between Henry's court and Portugal were quite good, making the suggested marriage less probable even if you wait a few years for the birth of his spouse (his actual wife was born in 1402 and he didn't marry her until 1428 when he was already 36, so there is no hurry).

In the event of Richard having escaped to France sans Isabella, I certainly can't see the latter being permitted to join him so he could see whether he could manage to sire the children with his second wife that he conspicuously failed to with his first. He could have had the marriage annulled for non-consummation and married again, but that wouldn't have played well with his French hosts. Even if through French diplomatic pressure Isabella was returned to France and they did have a daughter, that daughter would be in French hands and married off to a suitable French prince, not sent to Portugal to serve what French interest exactly?

I would suggest that Anglo-Portuguese union should be sought by another means. The Portuguese royal line were representatives of John of Gaunt's issue from his first marriage after the expiry of the legitimate descent of Henry IV, so perhaps something could be done with that.
 
Isabella's eleventh birthday was on 9th November 1400. I suggest that she was unlikely to have had a child that year. Further, she was naturally not imprisoned with her husband so it is hard to see him escaping with her. Duarte of Portugal was the nephew of Henry IV, his mother Philippa of Lancaster being Henry's full sister. I would imagine then that relations between Henry's court and Portugal were quite good, making the suggested marriage less probable even if you wait a few years for the birth of his spouse (his actual wife was born in 1402 and he didn't marry her until 1428 when he was already 36, so there is no hurry).

In the event of Richard having escaped to France sans Isabella, I certainly can't see the latter being permitted to join him so he could see whether he could manage to sire the children with his second wife that he conspicuously failed to with his first. He could have had the marriage annulled for non-consummation and married again, but that wouldn't have played well with his French hosts. Even if through French diplomatic pressure Isabella was returned to France and they did have a daughter, that daughter would be in French hands and married off to a suitable French prince, not sent to Portugal to serve what French interest exactly?

I would suggest that Anglo-Portuguese union should be sought by another means. The Portuguese royal line were representatives of John of Gaunt's issue from his first marriage after the expiry of the legitimate descent of Henry IV, so perhaps something could be done with that.
POD
Richard II escapes from his Castle and flees to Castile via France with his wife, Isabella of Valois, after that King Henry IV becomes the illegitemate King of England, Richard II sires a daughter to Isabella of Valois in year 1402 named Marie who marries Duarte Avis of Portugal in 1415 thus Duarte Avis gets a claim to the throne of England.
Duarte of Portugal secures Gascony from the forces of Henry IV and becomes the Duke of Gascony
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Can this work..
 
Isabella would then have been 12 rather than 10 when impregnated. This would still be considered far too early and generally frowned on. How did Duarte get his forces to Gascony? When was this? One presumes that his mother at least would not have been in favour, and she died in 1415. His father also is the one who concluded the alliance between Portugal and England which has never been broken yet, making it the world's oldest, so one presumes he wouldn't be in favour either. His death was in 1433.

Agincourt took place in 1415, and for quite a long time after then English forces were very powerful in France. Their final defeat was not until the early 1450s, though the writing had been on the wall for a long time by then. I don't think Duarte's opportunity to take Gascony, which the French anyway wanted for themselves, would have arrived by the time of his own death in 1438. And you haven't explained how come the French sent this immensely important half-French princess to Portugal in the first place, rather than marrying her to one of their own dynasts.

So I think the scenario still needs a bit of work.
 
Isabella would then have been 12 rather than 10 when impregnated. This would still be considered far too early and generally frowned on. How did Duarte get his forces to Gascony? When was this? One presumes that his mother at least would not have been in favour, and she died in 1415. His father also is the one who concluded the alliance between Portugal and England which has never been broken yet, making it the world's oldest, so one presumes he wouldn't be in favour either. His death was in 1433.

Agincourt took place in 1415, and for quite a long time after then English forces were very powerful in France. Their final defeat was not until the early 1450s, though the writing had been on the wall for a long time by then. I don't think Duarte's opportunity to take Gascony, which the French anyway wanted for themselves, would have arrived by the time of his own death in 1438. And you haven't explained how come the French sent this immensely important half-French princess to Portugal in the first place, rather than marrying her to one of their own dynasts.

So I think the scenario still needs a bit of work.

Perhaps it is better to merge this with my idea of my other TL, perhaps I will make the child of Isabella and Richard a Male rather than Female, a pretender who gets Gascony and sires only a Female heir married to the Avis dynasty.
 
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