From the National Cancer Institute

"Secondhand smoke (also called environmental tobacco smoke, involuntary smoke, and passive smoke) is the smoke given off by a burning tobacco product and the smoke exhaled by a smoker.
At least 69 chemicals in secondhand smoke are known to cause cancer.
Secondhand smoke causes lung cancer in nonsmokers.
Secondhand smoke has also been associated with heart disease in adults and sudden infant death syndrome, ear infections, and asthma attacks in children.
There is no safe level of exposure to secondhand smoke."
'The Roy Castle Lung Cancer Foundation' was set up to combat the effects of passive smoking - coincidence maybe; perhaps he intended his money to be donated to Battersea Dogs Home
Jim Carroll