I chose this cozy bed and breakfast because it was located around the corner from my cousin''s apartment in Hampstead, but I would choose it again in a second. Extremely affordable (for London, anyway), the Dillons Hotel is located on a very pretty residential street and is convenient to both the Jubilee and Northern Tube lines.
I booked a single room (bathroom down the hall) and got a fairly large room with a single bed, a sink, a desk, and a window that opened onto the quiet street. Breakfast - consisting of coffee or tea, toast, cereal and yogurt - was included and served in the sunny breakfast room on the ground floor. The bathrooms down the hall weren''t beautiful, and I almost panicked when the water barely trickled out of the shower head (until I found that the shower in the other bathroom was much more powerful) but they were clean and adequate. All in all, a great value!
For online reservations, check out DillonsHotel.com.