The Bank of England is expected to cut interest rates for the first time since 2009 on Thursday as Britain's economy slips towards recession in the wake of June's vote to leave the European Union.
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The Bank wrong-footed financial experts three weeks ago by leaving rates unchanged, but it said most of its policymakers were likely to support action in August as post-referendum uncertainty depressed the economy.
Since then growth appears to have slowed sharply - an industry survey on Wednesday suggested the economy was in fact shrinking at the fastest pace since the BoE last lowered rates in 2009, as the country went through its worst recession since at least the 1930s.
Almost all economists now expect the BoE to cut rates by at least a quarter percentage point on Thursday to a record-low 0.25 percent. Many also think it may resume its multi-billion-pound program of government bond purchases.
"There is enough evidence on the negative shock to the economy that some easing is justified," Investec economist Philip Shaw said. But he viewed the scale of the slowdown as too unclear for the BoE to buy bonds on top of a rate cut.
The BoE's chief economist, Andy Haldane, has said he is willing to respond to weak growth by using "a sledgehammer to crack a nut." But another, Kristin Forbes, said last month she had not seen enough evidence to support a rate cut .
Most business and consumer surveys have been pointing to a marked slowdown, although it is too early for any cast-iron official data on how output has been affected by June 23's Brexit vote.
Data on car registrations out on Thursday, however, hinted at a slowdown in consumer spending - a key pillar of economic growth recently - with private registrations dropping 6.1 percent year-on-year in July.
The BoE will announce its policy decision at 1100 GMT, and Governor Mark Carney will hold a news conference at 1130 GMT.
If the BoE does cut its Bank Rate to the lowest level in its 322-year history it will join the Bank of Japan and the Reserve Bank of Australia, which both undertook unprecedented stimulus in the past week.
Only the U.S. Federal Reserve among the world's main central banks is considering tighter policy this year.
RATE CUT IMPACT QUESTIONED
However, economists including former top BoE officials have doubts about how much good either rate cuts or more quantitative easing will do for the economy, with both official interest rates and government borrowing costs already at or near record lows.
Charles Bean, who stepped down as the BoE's deputy governor in 2014, said the Bank still had options, such as expanding the array of assets it buys beyond government bonds to include corporate debt or even equities. But that could put public money at risk and be politically difficult.
"If you go into buying equities, as the Bank of Japan has dabbled with ... that is taking the Bank into quite political territory. If there was a decision to go that way it should be in conjunction with the Treasury," Bean said on Tuesday.
Many economists also expect the BoE to revitalize its waning Funding for Lending Scheme or take other measures to tempt banks to lend at record-low rates.
Thirty-five academic economists said the BoE should finance infrastructure projects or use new money to direct cash transfers to households, in a letter published in the Guardian on Thursday, which argued that existing monetary policy tools were ineffective.
As well as its rate decision, the BoE will publish the first exchange of letters between Carney and new finance minister Philip Hammond, who last month replaced George Osborne, the man who plucked Carney from the Bank of Canada more than three years ago.
Carney must write to Hammond because annual inflation was just 0.5 percent in June, far below its 2 percent target.
This is unlikely to be a problem for long. Sterling's 12 percent slide against the dollar since the EU vote looks set to send inflation soaring above target.
But there will be a focus on any hint of extra government spending to support the economy, after Hammond said he may use a half-year budget statement in the autumn to reset fiscal policy.
(Editing by Larry King and Hugh Lawson)