We asked 79 tea drinkers to blind-taste and rate 12 everyday teas from supermarkets such as Asda, Sainsbury’s and Tesco, alongside big-brand tea bags from PG Tips, Tetley, Twinings and Yorkshire Tea.

"We're continuing to trial options for decaf teabags and are working ... Waitrose's sustainability updates here. The Yorkshire Tea website says: "The bags in all our regular UK Yorkshire Tea ...