The Battle of Stamford Bridge and the Battle of Hastings from a Welsh perspective from the Welsh chronicle

“1066. And then a year after that, Harold, king of Denmark, meditated the subjection of the Saxons ; whom another Harold, the son of earl Godwin, who was then king in England, surprised, unwarned and unarmed, and by sudden attack, aided by national treachery, struck to the ground, and caused his death. That Harold who, at fìrst earl, through cruelty after the death of king Edward unduly acquired the sovereignty of the kingdom of England, was despoiled of his kingdom and life by William the Bastard, duke of Normandy, though previously vauntingly victorious. And that William defended the kingdom of England in a great battle, with an invincible hand, and his most noble army.”

From: Brut y Tywysogion pgs 45-47

https://ia601904.us.archive.org/32/items/brutytywysogiono00cara/brutytywysogiono00cara_bw.pdf