The coroner conducted his investigation following an inquest into Mr Fenn’s death on 25 February 2026.
He said Mr Fenn had been admitted to A&E at Colchester General on 1 February 2025 with suspected sepsis and septic left knee arthritis – days after his initial hospital discharge.
The patient had previously undergone knee replacement and revision surgeries over many years, he said.
But following urgent surgery on 2 February 2025, he was admitted to intensive care where his condition “progressively deteriorated”.
He died of natural causes in hospital on 12 February at 10:23 GMT, the coroner concluded.
Mr Fenn had suffered multi-organ failure, septicaemia, septic arthritis left knee – as well as issues with his liver and kidneys.