UK polls explained: What led to Rishi Sunak's defeat and how did Keir Starmer-led Labour secure a win after 14 years?

Some experts say Rishi Sunak overpromised and underdelivered, leading to his greatest failure

source https://www.livemint.com/politics/what-led-to-rishi-sunaks-defeat-ten-updates-akshata-murty-sudha-murty-narendra-modi-keir-starmer-11720254430585.html