The family of a road rage victim who was stabbed to death by a paranoid schizophrenic have called for the NHS to end its “systematic arrogance” surrounding medical care as his killer was sentenced to life.

Donald Lock, 79, was stabbed by Matthew Daley 39 times after crashing into the back of his Ford Fusion while travelling at less than 20mph in July last year.

Lewes Crown Court heard that before the incident, Daley’s family had “pleaded” with clinicians to section him. His father, John Daley, also wrote letters predicting his son could harm someone, stating: "I am worried that it will end up with a fatality unless Matthew gets help with his obsessional behaviour and the voices."

Daley, 35, was today sentenced to life with a minimum term of 10 years following a trial at Lewes Crown Court.