Switching to vapes 'could save NHS more than half a billion a year', study says The Independent Behaviour Change By Design (BCBD)Policies for tobacco and e cigarette use: a survey of all higher education institutions and NHS Trusts in England Behaviour Change By Design (BCBD) E cigarettes more effective than patches, gum at helping people quit smoking, study finds MinnPost NHS Health Scotland: E cigs 'definitely' less harmful than smoking