Government scientists are being sent to the V Festival to analyse samples of so-called legal highs amid renewed warnings against taking the party drugs.
The Home Office is launching a national campaign highlighting the risks of legal highs including laughing gas, which was more widely used than powdered cocaine and ecstasy last year.
They are aiming to gather information about which new substances are available in the UK, and the latest Home Office annual report on the trends is due to be published today.
More top news
Facebook has completed its first test of a solar-powered drone that carries internet signal in the skies above the UK.
Russia goalkeeper Igor Akinfeev has thanks fans for their support after he was struck by a flare thrown during a qualifier in Montenegro.
Astronauts arriving for their new mission hug the crew on arrival at the International Space Station.