<sod >Sir Nicholas Macpherson, permanent secretary at the Treasury, told the Chancellor: âThere is no evidence that adequate proposals or policy changes to enable the formation of a currency union could be devised, agreed and implemented by both governments in the foreseeable future.< eod>< sod > Sir Nicholas Macpherson, permanent secretary at the Treasury, told the Chancellor: "There is no evidence that adequate proposals or policy changes to enable the formation of a currency union could be devised, agreed and implemented by both governments in the foreseeable future." He added: "You can expect the Scottish Government to threaten not to take on its share of the UK's debt.< eod>