Can't believe I haven't contributed to this thread yet!
Living in the UK, tea is relatively big here (although coffee is slowly taking over). I really like my Fortnum and Mason tea, which in the Piccadilly area of London - basically near all the big barber shops/brands and just on street away from the infamous Jermyn Street.
My favourites from that house are the Royal Blend, Classic Earl Grey (especially mixed with a bit of Turkish tea from the local Turkish green-grocer) and another one that's great for colds and flu - Yunan with Eucalyptus. Yunan being a white tea from a district in China of the same name. All of these are sold 'loose', so you need to make it in a pot!
Failing these there's always Twinnings or Yorkshire Tea which are big household names here.
