Why can't you check google ?
Indeed. One of the best ways to find out what's available in either tea or coffee or any other foodstuffs, is to go to the online shopping portal of any of the big supermarkets trading in Poland like Auchan, Carrefour, Lidl etc.
A weird thing about teas in Poland is that many of them are marketed as 'English' with names like Sir Roger Something-or-Other or London this-and-that but none of them are brands that you find in England or indeed anywhere in the British Isles. Another thing to note is that the blends of tea being offered as 'English' are very bland and weak compared to what you'd actually get in England. When it comes to real English tea such as Liptons and Tetley, the blends are somewhat coarse and not very tasty, I don't know whether they blend them specially for the Polish market. Liptons is certainly not a popular tea in England anymore. The best genuine English blends available in Poland in my opinion are from Twinings. I drink their English Breakfast and Earl Grey, both loose teas.
@CMS, thanks for the tip about Carrefour. Will be trying that!