The guesthouse was lovely! It is nicely decorated, clean, and very welcoming with lot of lights and fresh flowers when I arrived. I highly recommend this accommodation and will probably rent it again if I return to London. Communication with Malika was easy and I had the pleasure of meeting her as I left the place :-)
The house is located in a safe and quite area, 5 minutes walk from Stockwell station, which is very convenient.
Also, it was useful to find a multi-phone charger there as I had forgotten the UK adapter plug!