This place isn't actually a Betjeman and Barton outlet -- it's another store that sells their tea, plus a huge range of floral-patterned dishes and similar stuff. I learned about their tea when I had a great green tea in Nice, and asked about the brand -- that green tea flavored with cherries is called "Memory" -- no, the English word, not "Memoire." I bought some, and it's quite good, though for some reason never quite as spectacular as that first time. I guess it really is about the setting and the moment.
Other good teas they have are Pushkin - very interesting flavor and a house specialty. For decaf teas, I got a good African rooibos tea.
I'm not a huge tea person, but I highly recommend the place. Perhaps you would want to go to the main store which probably has a larger selection. read more