The ‘shopping baskets’ of goods and services used to calculate RPI and CPI change each year to better reflect consumer spending. For example, in 2022 items like meat-free sausages, antibacterial surface wipes, and recreational climbing sessions were added to both indices. At the same time, items that were removed included laminate flooring, reference books (such as atlases and dictionaries), and coal.
You can download the most recent RPI and CPI shopping baskets as an Excel spreadsheet via the ONS website.