For the tourists and visitors who would like to spend a few days in London I would kindly recommend Astor Hyde Park Hostel as it is a great location, very quiet and beautiful area.
All the staff are very kind and helpfull and at your service 24/7.
Rooms are very clean and bright, well organised with en-suit bathroom, a little storage provided for each bed where you can put all your luggage, shoes, so the room is nice and tidy. Beds are very nice and comfortable, exceptionslly clean. I will stay in this hostel every time I come back to London as it is the best place I stayed until now.