An independent Scotland that kept the pound would have a neo-colonial relationship with the rest of the UK because it would have no say over key economic and monetary decisions, Gordon Brown said on Friday.
One of the world's top economists has warned that an independent Scotland's economy would crash within seven years if it tried to use sterling.
Alex Salmond has given his clearest indication yet that he would want an independent Scotland to keep the pound, even without a formal currency pact, after stating "we are keeping it, come what may".
Alex Salmond has refused to be drawn on his back-up plan if an independent Scotland is blocked from sharing the pound and the Bank of England now the Conservatives, Labour and the Liberal Democrats have all ruled out a currency union.
Alex Salmond has provoked a fresh battle over his plans for the Scottish currency after independence by declaring "it's our pound and we're keeping it."
A global regulatory body chaired by Bank of England governor Mark Carney has found that activity in foreign exchange markets is 10 times greater during a crucial trading period that is already the subject of a wide-ranging international investigation.
London will be the base for the first clearing bank outside Asia for the Chinese currency, supporting Britain's push to be the leading western centre for offshore renminbi trading.
The failed Tokyo-based bitcoin exchange, Mt.Gox, received court approval on Tuesday to begin Chapter 15 bankruptcy proceedings in the United States as it awaits approval of a settlement with U.S. customers and a sale of its business.
Greenpeace has fired an employee after it group discovered he lost some 3.8 million euros ($5.15 million) in a bet on international currency markets.