I use a filter jug, partly for the tea and partly for the sake of the kettle. I too have family in Suffolk and find the water there grates a bit, so here it must be softer, though when I lived in a proper soft-water area in Cumbria it took some getting used to, particularly washing your face and hair as there was never that squeaky-clean feeling, which to me felt like the soap hadn't rinsed off. Birmingham has lovely water, comes off the Welsh hills apparently. Comes out a bit brown sometimes though.