Proposals for an exchangeable were originally due Wednesday after being sprung on bankers, who were only given 48 hours notice to put together a structure that many believed to be completely unworkable from the outset. After vociferous complaints, the government was said to have reluctantly agreed to extend the deadline on the final afternoon, only to inform the market that it had changed its mind 15 minutes later, before finally conceding defeat for a second time and allowing banks until today (Friday) to arrange their submissions.