Helen and her mom are such nice people. I felt very welcomed and the house is really cozy and clean. Everything is such as it is described.
It is a ten-minute walk to the nearest station (Clapham South) and there is also easy access with bus. I recommend "citymapper" app to make rides easier (bus-tube combinations with oyster card). Central London is about 20-30 minutes away.
I would definitely come back!!