Festivalgoers’ urine to fertilise trees in Brecon Beacons restoration scheme

Fertiliser created from waste produced in block of toilets used by 700 revellers at Boomtown festival last year

Scientists are aiming to grow 4,500 trees at a national park with the help of fertiliser made from festivalgoers' urine.

The fertiliser was created by the Bristol-based startup NPK Recovery, which connected its unit to a block of toilets used by 700 revellers at Boomtown festival in Hampshire in July last year.