When you step inside Fauzia's house, the smell hits you immediately. It is a combination of raw sewage and insecticide.
"I have to spray this house every morning," says Fauzia, who has been living here with her family, on a street of terraced houses in west London, for eight months.
She holds a can of insect repellent in one hand as she covers her nose with the other.
"I spray before my kids come downstairs to eat their breakfast. This is how I live."
The white walls are dotted with black flies - but the biggest problem is a shower room next to the kitchen.
Excrement overflows from the toilet bowl on to the floor and fills the shower cubicle.