DD is good for the coffee - but as for donuts, I'm not a cake donut person. Count me as a sugar coated lump of yeasty goodness lover. I truly believe that if the whole world could eat Krispy Kremes, there would be an outbreak of world peace, and probably diabetes.
Nevertheless, I saw a DD on Fleet Street in london this weekend. Couldn't bring myself to go in, but it's there, don't remember the exact location but it was between st.pauls cathedral and the blackfriars subway stop.