What day did the son of Lady Margaret Beufort seize the English crown?
Henry VII of England Henry VII (Welsh: "Harri Tudur" ; 28 January 1457 – 21 April 1509) was King of England from seizing the crown on 22 August 1485 until his death on 21 April 1509, and the first monarch of the House of Tudor. He ruled the Principality of Wales until 29 November 1489 and was Lord of Ireland.
Edmund Mortimer, 5th Earl of March Edmund de Mortimer, 5th Earl of March and 7th Earl of Ulster (6 November 1391 – 18 January 1425) was an English nobleman. A great-great-grandson of King Edward III of England, he was heir presumptive to King Richard II of England, his first cousin twice removed, when Richard II was deposed in favour of Henry IV. Edmund Mortimer's claim to the throne was the basis of rebellions and plots against Henry IV and his son Henry V, and was later taken up by the House of York in the Wars of the Roses, though Mortimer himself was an important and loyal vassal of Henry V and Henry VI. Edmund Mortimer was the last Earl of March of the Mortimer family.