Smoking in prisons could be banned to protect prisoners from unhealthy living.
The Prison Service is set to begin a pilot scheme to prevent passive smoking in prisons across England and Wales.
Tobacco products will be banned from prisons in the South West including Leyhill Prison, in Wotton-under-Edge, and Eastwood Park Women's Prison, in Fairfield.
The scheme will begin next Spring and will spread to other prisons for a 12-month period.
The campaign was launched after it was anticipated that prison inmates and staff could file for compensation for passive smoking.
Prisoners are to be offered nicotine patches to help with the transition.
A letter sent to senior prison staff read: "You will no doubt be aware that the decision has been made that the time is right for the prison estate to adopt a tobacco and smoke-free policy to provide a smoke-free workplace/environment for our staff and prisoners."
But warnings have been sounded that it could deprive a group who are not always "charming or polite" of another thing they enjoy.