The walls are still blue in the bedroom where Ella Adoo-Kissi-Debrah once slept. Against the makeshift sky the little girl created, she stuck pictures of aeroplanes.
For before succumbing to the asthma which blighted much of her childhood, nine-year-old Ella dreamt of becoming a pilot. Lying in her bed, she could pretend she was flying through the air.
But what would Ella have said if someone had told her it was the air that was actually making her so sick?
That is a question her mother, Rosamund, has been asking herself since a coroner made legal history last week by ruling that illegal levels of air pollution near the family home in Lewisham, South London, contributed to her daughter's death in 2013.