The road trip, which began this week, will also visit the Parliament in Dublin before leaving for Britain to visit devolved institutions in Wales and Scotland and before visiting Westminster.
Sinn Féin Spokesperson for Health Councillor Patricia Logue said
“Sinn Féin’s support for medicinal cannabis will always be based on clinical evidence.
“We support the use of medicinal cannabis by patients where it is medically recommended.
“Any draft legislation on cannabis to be considered for Ireland – north or south –must be robust, clear, rooted in clinical evidence and available for medical use only.
“I commend the efforts of Charlotte and Billy Caldwell, and others like them, who are campaigning for legislation on the use of cannabis for medical purposes and I wish them the best on their road trip across Ireland and Britain.”