<h1>Visa denial on political grounds blocks scheduled university speech and raises procedural fairness concerns regarding immigration exclusions.</h1> A prominent opposition politician alleged a visa refusal prevented him from speaking at a university event, receiving a regret letter at the airport while having been told the application was being processed; a diplomatic note cited procedural timing and national holidays for the failure to process, while the immigration authority offered no comment. The incident raises tensions between immigration control and freedom of expression, and follows prior refusals that invoked public order or 'not conducive to the public good' grounds tied to support for proscribed organisations.