This is a garden bungalow that sleeps one (two?). It is currently being used by my son for his piano practice, and by my sister when staying overnight. Most of the time, however, it is free. The minor disadvantage is that you enter through the house (it's in the backyard) and you cross the garden to use the in-house bathroom (torches and slippers provided). Other than that it's warm and artsy.
It is close to Manor House, the gorgeous Finsbury Park, and to a big shopping centre.