Who reformed royal administration, such as William de Ros, during his rein as King?
William de Ros, 1st Baron de Ros: William de Ros or Roos, 1st Baron de Ros of Helmsley (c. 1255 – 6 or 8 August 1316), was one of the claimants of the crown of Scotland in 1292 during the reign of Edward I. Edward I of England: Edward I (17/18 June 1239 – 7 July 1307), also known as Edward Longshanks and the Hammer of the Scots (Latin: "Malleus Scotorum" ), was King of England from 1272 to 1307. Edward I of England:  He spent much of his reign reforming royal administration and common law.
Edward I