Core inflation, which excludes energy, food, alcohol and tobacco, rose by 5.7%, down from 6.1% in September and its peak of 7.1% in May.
The drop in housing prices was the largest contribution to the fall in inflation, contributing 1.6 percentage points to the 2.1 percentage point decline.
The ONS reported that the drop had been the lowest since records began in January 1950.
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The fall in housing costs came largely from the government's energy price gap fall in Ofgem's energy price cap in October, which saw energy prices for households reduce.
Other smaller contributors to the drop included a decline in food prices (0.2 percentage points), its lowest level since June 2022, and the cost of restaurants and hotels (0.1 percentage points).
Despite the dramatic fall, UK inflation remained above major economies like the US (3.2%), Germany (3%) and France (4.5%) in October.
Meanwhile, core inflation, which excludes energy, food, alcohol and tobacco, rose by 5.7%, down from 6.1% in September and its peak of 7.1% in May.
Hugh Gimber, global market strategist at JP Morgan Asset Management, said that the weakness in core inflation «will be more significant» for the Bank of England than the drop in the headline figures.
«The drag lower from energy base effects as last year's changes to the price cap fall out of the numbers has been long awaited, and well understood,» he explained.
«It is more important, is to see some of the stickier parts of the inflation basket cooling more quickly than previously forecasted.»
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Gimber said the data lent further support to the BoE's recent commentary that interest rates
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