Question: What exactly did Del and Rodney's mother die of?
Answer: Joan Mavis Trotter (Nee Hollins) was an unseen character in Only Fools And Horses, having died in 1964, 17 years before the series began. She died of an alcohol related illness due to both her sham marriage to Reg Trotter and being hit hard by the death of her secret lover Freddie "The Frog" Robdal.
Answer: Short of breath.
Question: When Marvin is left behind in the Disaster Area ship as the others teleport away, he says, "I'm so intelligent I've probably got time to go through the five." before he is cut off. Is there anything in the books or rest of the series which suggests what we was about to say?
Chosen answer: An apparent long string of illnesses.