The source for this seems to be the little splurge of cases of British people trying to smuggle legal cannabis in Thailand, to Britain where it is illegal and therefore more expensive.
Because of the publicity, it’s made the British press and that has sparked a story in Thailand.
it’s fairly amateurish stuff, easily sorted by an uptick in sniffer dog activity at a few airports.
But, of course, journalism has to try to generate reader reaction and engagement, hence a lurid headline designed to do just that.