Watch children's messages shame hospital smokers

People lighting up outside four hospitals will be urged to put out their cigarettes by the voices of schoolchildren.

Buzzers have been installed at Cardiff and Vale health board sites, with visitors and patients urged to press them if they see anyone smoking.

A recorded message will then tell them how harmful smoking is to people around them and offer help to quit.

Smoking on hospital grounds is illegal and anyone seen smoking could be handed a fixed penalty notice of £100.

Video edited by Erin Lister