UK Debt Interest Payments Hit £10.9bn in September, Highest September on Record

Debt interest payments reached £10.9bn in September 2026, the highest September figure since records began, the Office for National Statistics (ONS) said. Bonds linked to the Retail Prices Index (RPI), a measure of inflation, added £4bn. According to The Guardian, higher inflation linked to the Iran war's effect on energy costs raised these costs.