The openings come amid a ban on smoking by the local NHS trust.
The streaming service aims to stub out the fags after a study showed it contributed to a rise in on-screen smoking.
The experts suggest smoking “stigma” has inadvertently diverted research attention away from lung cancer.
Overall more than half a million smokers will be supported to quit over the next five years.
The number of 18 to 24-year-olds who smoke has fallen eight percentage points since 2011.
Letting smokers vape on NHS sites can support smokers in remaining smoke-free, the Royal College of Physicians said.
Teenage schoolchildren who use e-cigarettes dramatically increase their chances of graduating to tobacco, research has shown.
More than half of the nearly-three million people in Great Britain who vape are ex-smokers, a new survey suggests.
Public Health England wants smoking to be banned in every hospital's buildings and grounds.
The research is the first to demonstrate that the auditory brain stem is vulnerable to damage from nicotine.