From the longer Wikipedia page 
John Tuchet, 6th Baron Audley, 3rd Baron Tuchet (1423– 26 September 1490) was an English politician.
In 1461 at Calais, then belonging to the English crown, he was taken prisoner by the Earl of Warwick whilst on a military expedition during the Wars of the Roses. He there met the future Edward IV and was persuaded to defect to the Yorkist cause and fought for Edward at the Battles of Mortimer's Cross (1461), Barnet (1471) and Tewkesbury. He was subsequently invested by Edward in 1471 as a Privy Counsellor (PC) and later (1484) served as Lord High Treasurer and Commissioner of Array. He was joint commander of the Army and held the office of Master of the King's Dogs in 1471.