So from 2007 the Fed repurposed an instrument that was first developed in the age of Bretton Woods. To manage the fixed currency system in the 1960s the central banks had developed a system of so-called currency swap lines that allowed the Fed to lend dollars to the Bank of England against a reverse deposit of sterling in the accounts of the Fed.18 Having gone out of use in the 1970s, the swap lines had been briefly revived in 2001 to deal with the aftermath of 9/11.
