It came after the minutes from the Bank's latest Monetary Policy Committee meeting revealed that the idea of cutting the interest rate banks are paid on the reserves they hold there was not discussed this month. The pound has lurched lower in recent weeks, thanks in part to speculation that the Bank will impose charges on banks for holding excessive amounts of cash in reserve at its vaults. Under QE, it is pumping £175bn into the economy, but much of this cash is sitting in banks' reserve accounts rather than being recycled and flowing around the broader economy.