A line chart from the Institute for Government showing NHS elective cases waiting less than 18 weeks, by trust, October 2017 to August 2025. The median share of cases completed within 18 weeks fell sharply in 2020 and has remained below pre-pandemic levels. The chart shows wide and growing variation between trusts, illustrated by the expanding gap between the 25th and 75th percentiles, as well as the minimum and maximum ranges.