The death record for JJC merely reports that he did not die at home. He died while on Bury New Road. Maybe he simply had a heart attack, or was hit by a car. It is hardly a surprise that someone who died that young, did not die at home. My mother's father died of a heart attack at the same age on the platform at St. Alban's rail station.
Betsy Portner's birth was registered in Q2 1902. Here are two possible deaths for her:
Bessie Cohen, bom ? Mar 1902, died Q3 1970 (death registered in Bury)
Bessie Cohen, born 18 Jan 1902, died Q1 1981 (death registered in Manchester)
Either one is a very long time after JJC's death.