10CS, "prices in general have risen by much more than 9.9%. That's factual too."
From the Office for National Statistics in January,
"As we wrote last November, the ONS produces its headline inflation rate every month. It is produced by collecting the prices of over 700 everyday goods and services bought by UK households in numerous locations up and down the country, as well as online, to give us over 180,000 price points. We combine those with detailed information on spending patterns to calculate accurate price changes for goods and services in the UK."
Looking only at the items you buy on a regular basis is completely different from the 700 items used by the ONS.
That isn't to say the "basket" of items you buy hasn't gone up by much more than 9.9% but that isn't true across the country.