The certainty the Governor of the BoE was trying to give borrowers by tying an increase in interest rates to unemployment has gone.
Mark Carney's neutral presentation of the facts on currency union may well cause those campaigning for independence some severe headaches.
Bank of England Governor Mark Carney hasn’t quite abandoned forward guidance although, he has said it’s going to have to “evolve”.
The Bank of England Governor has warned that a newly-independent Scotland would be forced to hand over some national sovereignty if it wanted to keep the pound.
But Mark Carney appeared to step back from getting involved in the political row oer independence, saying: "Decisions that cede sovereignty and limit autonomy are rightly choices for elected governments and involve considerations beyond mere economics.
"For those considerations, others are better placed to comment."
Bank of England governor Mark Carney's decision to speak publicly about the possible consequences of Scottish independence has been welcomed by Downing Street.
Prime Minister David Cameron's official spokesman said: "It's hardly very surprising that the independent governor of the Bank of England might wish to address and consider some of the issues that are involved.
"The issue around currency is an important part of the debate that is currently going on in Scotland. It hardly seems a great surprise at all, on the technical issues, that the governor of the Bank of England might want to set out his views.
"I'm sure the people of Scotland will want to be as well-informed as possible."
First Minister Alex Salmond said he had an "excellent meeting" with Bank of England governor Mark Carney over Scottish independence.
Mr Salmond, who wants a currency union with the UK if Scotland backs independence in a referendum in September, also reiterated that "the Bank of England is independent and doesn't intervene in politics."
First Minister Alex Salmond has confirmed that talks with the Bank of England governor Mark Carney over a currency union if Scotland wins independence will continue in the run-up to the referendum.
Mr Salmond held talks with Mr Carney in a private meeting today, but the First Minister said afterwards: "I was delighted to welcome the new Bank of England governor to Edinburgh on his first official visit to Scotland since his appointment.
"We greatly value our strong working relationship with the Bank of England and its commitment to operational independence and impartiality in political debate.
"The discussion was private but I welcome that the governor has confirmed his willingness to continue technical discussions, inaugurated by his predecessor Lord King, between the Scottish Government and the Bank of England in advance of the referendum."
Scotland's First Minster has said that Mr Carney's predecessor at the Bank of England, Sir Mervyn KIng, had suggested the Treasury could change its approach in the event of a Yes vote.
Alex Salmond told how he had met Sir Mervyn "a couple of years back", and added: "The first thing he said to me was 'your problem is what they say now', meaning the Treasury, 'and what they say the day after a Yes vote in the referendum are two entirely different things'."
Mr Carney, who took over as Governor of the Bank of England in July, has already warned of "challenges" of adopting a shared currency without having "certain institutional structures" put in place.
Scotland's First Minister will have face-to-face talks with the latest Bank of England governor for the first time today. Alex Salmond and Mark Carney are due to meet in Edinburgh.
Mr Carney is also giving a speech in the capital, in which the issue of a currency union between an independent Scotland and the rest of the UK will be addressed.
Mr Salmond's Scottish Government has put forward plans for Scotland to retain the pound if the country votes for independence in September's referendum, establishing a "sterling zone" with the UK.
The Bank of England has forecast 0.9% growth for the fourth quarter but economic data published since then have prompted some experts to expect a slightly lower rate.
A bumper Christmas that saw retail sales shatter expectations by climbing 2.6% in December will not have helped boost overall figures too much after a slow performance from the sector in October and November.
Meanwhile latest official figures from the construction industry showed it was likely to drag on GDP, after succumbing to a 4% slump in November, despite being buoyed by Government policies such as Help to Buy.
Chancellor George Osborne has dismissed claims that the Bank of England policy of providing forward guidance has failed as "laughable".
Mr Osborne told Channel 4 News: "I think that is completely wrong. The idea that it is a failure because your unemployment rate is falling is laughable.
"The credibility of the Bank of England, of the British Government's economic policy is clear there in the markets."