I can't recommend Sarah's flat highly enough! It is amazingly comfortable; a real home (best library of any Airbnb I've stayed at). And it's so close to the city center. Also, the garden is a welcome respite too, after busy days in the city. The underground is close by, and there are shops and pubs within a few minutes walk in all directions.
But the real prize is Sarah herself; she is lovely and considerate wonderfully helpful. She met us and got us settled, showing us the flat and telling us about the neighborhood. And she continued to answer questions through out our stay.
This place is everything you want from an Airbnb, and Sarah is the reason. 😀