I think Nadine's listing offers a good value for the price: it is located not far from 3 tube stops, there are 2 bathrooms in the house and it is possible to cook, all for a reasonable price in London.
However, I was very disappointed with the state of the room I stayed in and how unkept and neglected it felt. Indeed, there were several long strands of hair on the carpet, which I found disgusting and proved the room had not been vacuumed; there was what can only be described as random junk on the piece of furniture where the TV stood, such as a tube of beauty cream, clothes tags, a stack of sheets of paper, a battery, random bits of cellophane paper; hangers lying on the floor; the cupboard is also filled with bundles of personal things and clothes in disarray which prevents guests from using it.
While the kitchen is spacious and has modern appliances and there is more than enough space for your food in the fridge, I believe the fridge shelves as well as the cupboard shelves should really be wiped down as they have already gotten filthy and smelly. As a sidenote, there was a pot of cooked pasta abandoned on the stove that literally stood there for the 3 days I was a guest in the house.
It is my opinion that when you decide to use AirBnb as a long-term stream of income you should establish a certain standard of cleanliness and consistency and you cannot just do things the way you have always done, store all the junk you do not use in the guests' room and stick some tourist in your unused bedroom to make money out of it (which is what I felt was the case) in addition to the other bedroom you are renting long-term.
As I wrote earlier, I think Nadine offers a good listing however I believe the room should have a higher standard of cleanliness for future success.