Act Supt Emma Hart, of the joint operations roads policing unit of the Hampshire force and TVP, told the BBC: “We’re definitely seeing more young people use [nitrous oxide]… we know that we want to start mitigating that risk, but in order to mitigate it, you really need to understand the problem. This device helps us do that.
“There is currently no device available that can prove a driver inhaled laughing gas, making prosecution difficult.
“That is why our forces are leading this testing phase, to break new ground and prove these devices can help save lives on our roads.”