He remained loyal to the House of Lancaster when Henry VI was deposed by Edward IV and fought on the Lancastrian side at the Battle of Towton of 1461, after which he was attainted.
He was later pardoned, regained the family estates, was summoned to parliament as a baron, attended the coronation of Richard III, and was appointed Governor of Carlisle and Warden of the West Marches.
[1][2] He married Mabel Parr (d. 1508), a daughter of Sir Thomas Parr of Kendal, by his marriage to Alice Tunstall, a daughter of Sir Thomas Tunstall, of Thurland Castle.
His wife was the great-aunt to King Henry VIII's sixth consort, Catherine Parr, who coincidentally was the only other female in the Parr family to marry into the peerage when she married her second husband, Lord Latimer.
The brothers remained on the side of the House of Lancaster when Henry VI was deposed by Edward IV of the House of York, and both fought for Lancaster at the Battle of Towton of 1461.