The basket and weights for UK CPI are here: https://www.ons.gov.uk/economy/inflationandpriceindices/articles/ukconsumerpriceinflationbasketofgoodsandservices/20

The basket and weights for UK CPI are here: https://www.ons.gov.uk/economy/inflationandpriceindices/articles/ukconsumerpriceinflationbasketofgoodsandservices/2022 https://www.ons.gov.uk/economy/inflationandpriceindices/arti... and for the US: https://www.bls.gov/cpi/tables/relative-importance/home.htm https://www.bls.gov/cpi/tables/relative-importance/home.htm The weights are based on estimates of how consumers actually spend on different goods and services, rather than on how much someone would need to spend for subsistence or survival.