I'd be curious to know what tea they think is better, and what kind of tea they're drinking. When it comes to English breakfast tea, it's normally a blend of black tea leaf fannings from India, Sri Lanka, and Africa. Imo there's not that much objective difference in quality between brands like Yorkshire Tea, PG Tips, Twinings, Red/Gold Label, Tetleys etc... . A lot of it comes down to subjective taste.
For example, there's a strain of British person whose pride and self-identity is somehow tied up in enjoying very long brews with just a dash of milk. These people are likely to prefer teas with very strong flavours in the blend, such as Assam. Then there are people who enjoy subtle flavours. They might prefer Twinings Everyday which includes leaves from Yunnan.
I've got some single-source tea in my fridge that's significantly better than the supermarket blend. It's different every season though. https://obubutea.com
For example, there's a strain of British person whose pride and self-identity is somehow tied up in enjoying very long brews with just a dash of milk. These people are likely to prefer teas with very strong flavours in the blend, such as Assam. Then there are people who enjoy subtle flavours. They might prefer Twinings Everyday which includes leaves from Yunnan.