The NHS warns that as little as 4ml of methanol can cause hallucinations and blindness. Half an hour to two hours after consuming methanol symptoms include drowsiness, confusion and irritability.
Tasha Moore, a 22-year-old from Manchester, was due to stay at the Nana Backpacker Hostel in the popular tourist town of Vang Vieng in Laos but cancelled her booking the day before.