UK consumer prices inflation has fallen to a 15-year low of just 0.5%, driven by plunging oil prices.
There is a strong case for abandoning CPI as the headline measure of inflation, according to Institute for Fiscal Studies head Paul Johnson.
UK CPI inflation rose to at an annual rate of 1.3% in October, according to ONS figures released today.
UK CPI inflation has fallen to its lowest level in five years, undershooting estimates as the impact of falling petrol prices dragged the headline level down near to 1%.
UK consumer price inflation rose by 1.9% in the year to June, up from 1.5% in May, a larger increase than economists had expected.
UK CPI inflation fell for a sixth consecutive month in March to hit a fresh four-year low, according to latest figures from the Office for National Statistics.
The UK inflation rate dropped to 1.9% in January, marking the first time it has fallen below the Bank of England's target of 2% since November 2009.
The UK's headline rate of inflation fell to 2% in December, meeting the government-set target for the first time since November 2009, official figures show.