On 12 March 1909, the Cathedral authorities gratefully accepted the offer to build a new chapel for the Order of the Thistle at St Giles' and Edward VII appointed William Montagu Douglas Scott, 6th Duke of Buccleuch; Archibald Primrose, 5th Earl of Rosebery; John David Melville, 12th Earl of Leven; and Schomberg Kerr McDonnell as trustees with Thomas Ross as architectural consultant.