Although I stayed for a long time, it is a good ho...

Although I stayed for a long time, it is a good hostel where the staff is friendly and the building can feel the history. (It seems that the interior has changed to a modern one after staying)
You can walk to some of the National Museums on foot every day, and you can enjoy morning walks as there is Hyde Park on a 3-minute walk.
However, depending on the floor of the room, you have to go up the stairs considerably, so it is difficult to make a round trip. It may be good to request around 2.3 floors.