 These notes were nicknamed "Bradburys" because of the prominent signature of Sir John Bradbury, Permanent Secretary to the Treasury displayed on the notes.Britain returned to the gold standard in 1925, although the Bank of England was only obliged to exchange notes for gold in multiples of (the typical size of a "Good Delivery bar") or more.The responsibility for the printing of one pound notes was transferred to the Bank of England in 1928, and the ability to redeem banknotes for gold ceased in 1931 when Britain stopped using the gold standard.