
This is because many UK government bonds, or “gilts”, which the government sells to international investors to raise the money it needs, are “index linked”, meaning the government’s repayments rise in line with the Retail Prices Index (RPI) measure of inflation, which is currently at double-digit levels.
https://www.bbc.co.uk/news/business-64705051?at_medium=RSS&at_campaign=KARANGA,