I'm not one of those people who is obsessed by whether Roy Castle did or not smoke. Nor do I wish to attack him (or his memory) because I wouldn't wish lung cancer on my worst enemy and I applaud his efforts, after he was diagnosed, to help raise £12m to build, equip and run an international centre for lung cancer research.
Nevertheless, since his death in 1994 this popular light entertainer has been held up as proof that non-smokers can contract lung cancer as a result of passive smoking, the implication being that he was a victim of working in smoky clubs.
I suspect that no-one knows the truth, but in cases such as this we should certainly consider other factors.
This morning, on the Five Live phone-in, the chief executive of the Roy Castle Lung Cancer Foundation, Dr Rosemary Gillespie, was asked a direct question: did Roy Castle smoke cigars? Her reply:
"I am not prepared to discuss whether Roy Castle smoked."
Given the importance of Roy Castle to the passive smoking debate, I think we should be told, don't you?
Above: Deathbed, the Roy Castle Lung Cancer Foundation poster