16 Feb 2024 --- British tea brand Tetley is keeping a close watch on its tea supplies as UK imports of black tea reach a “critical period” owing to trade route disruptions caused by the ongoing Red Sea attacks by Houthi rebels. This comes after British retail giant Sainsbury’s recently warned UK shoppers that there is a “nationwide” problem with black tea supplies.“We are experiencing supply issues affecting the nationwide supply of black tea. We apologize for any inconvenience and hope to be back in full supply soon,” says a sign at one UK store.