A Scottish secondary school is saying "enough is enough" to the escalating problem of teenage vaping.
Royal High School in Edinburgh is one of the first in the country to install vape detectors in its toilets.
Like most schools it has been fighting a losing battle against vaping on the premises.
But head teacher Pauline Walker said it had taken a stand by introducing detectors that let out a screaming alarm if vaping happens nearby.
She told BBC Scotland News: "We want to send a message loud and clear. Vaping is not acceptable. We will not permit it. We will not promote it."
The Royal High has invested about £1,000 in the detectors, which were wired into the three main toilets in the school at the start of March.
They work like smoke detectors, but they pick up chemicals that are present in vape mist.
If pupils vape, the alarms go off immediately and a text message alerts staff.
They are already working as a deterrent.
Since being switched on, the school has had "almost zero activations" in the bathrooms.
