WI: Robert Curthose wins the Battle of Tinchebrai

I've always wondered this myself, but never put in the research required to be able to write a TL on it.
 
We might see Flanders annexed to England and Normandy at some point.

We might not see the same events ITTL, which lead to that IOTL. William Clito, the son of Robert Curthose, was given the county of Flanders by king Louis VI of France after count Charles the Good of Flanders was murdered (after a conspiracy of the Erembalds, who were the burgrave of Bruges). It was to further the claims of William Clito on England and Normandy and to have discord in the Norman dynasty. ITTL Louis might consider another member of the Norman dynasty for instance any son Henry Beauclerc and Willam Rufus might have had, however the counts of Flanders had other heirs like OTL Thierry of Alsace of the Metz dynasty and who would also gain Flanders IOTL.
Anyway I doubt Louis VI would grant Flanders to the king of England and duke of Normandy or his heir. Although maybe ITTL Charles the Good survives and the cadet branch of the Danish Royal house of Estridsen establishes themselves as count of Flanders.
 
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