We stayed at Sians B&B for 2 nights and were more than happy with the stay. The rooms and bathrooms are clean and the furniture and style very nice. There was a great breakfast buffet and the staff was eager to help and give good tipps what to see in the city. The house is literally 50 m from the tube station (northern line). You get to the city centre within minutes.
I will recommend this b&b to all my friends travelling to london.