24 festivals are to black out their websites and social media to raise awareness of the dangers of legal highs.
The blackout, which takes place on 5 May from 9am, is being conducted by festivals including T In The Park, Bestival, Secret Garden Party and Sonisphere.
The aim of the campaign is to dispel the misconception that legal highs are safe to use, highlighting the fact that last year saw an 80% increase in deaths from legal highs - from 29 to 52.
There are over 280 psychoactive synthetic drugs that are not covered by existing drug laws, with health researchers describing taking legal highs as like "dancing in a minefield."
Find out more information about legal highs below
For an entire day, the festival's websites and social media will be thrown into darkness, with the homepages displaying a black page adorned only with a grey light bulb and the message "Don't be in the Dark about Legal Highs."
Upon clicking the light bulb, information about legal highs will appear and the user will be able to find out more. It's not a complete blackout though, as it will then also be possible to navigate to the regular festival homepage.
The full list of festivals participating in the blackout on 5 May is as follows: T in the Park, Bestival, Lovebox, Global Gathering, Secret Garden Party, Sonisphere, We Are FSTVL, 2000trees, ArcTanGent, Kendal Calling, Festibelly, Blissfields, Truck, Brownstock, Y Not Festival, Tramlines, Belladrum Tartan Heart, Leefest, Nozstock, Wakestock, Shambala, Glasgow Summer Sessions, Parklife and Eden Sessions.