A spate of seizures of Thai cannabis in the UK, Germany, Indonesia and Hong Kong has cast a shadow over the Southeast Asian nation’s decriminalisation of the plant. Thailand became the first Asian country to decriminalise cannabis in 2022, promising a lucrative new cash crop for a market intended strictly for medicinal use. But four years on, with lawmakers still wrangling over cannabis control legislation, high street dispensaries have proliferated for recreational sale, while growers hit by...