Nine people escaped from a flat fire in Harrow on Wednesday (August 10) night after a neighbour smelt smoke coming from a flat below.
A flat on the first floor of the building in Kenton Road were damaged by the fire, while a small portion of the external glazing of another flat on the second floor also sustained damage.
It is thought that there were no working smoke alarms in the flat where the fire first started.
A total of nine people left the building before the arrival of the firefighters, with one man being treated for smoke inhalation by London Ambulance Service.
Station manager Charles Hanks, who was at the scene, said: "Flames were quite visible from the window as the fire started at the front of the building.
"Crews found access around the back of the building and found difficult conditions because the fire had got into the ceiling.
"Crews did really well to stop it from spreading any further as due to the type of building, it could have just carried on spreading through the terrace.
"The property where the fire started had no working smoke alarms, but thankfully the neighbour above smelt the smoke and raised the alarm. But you should never leave it to chance and ensure you have smoke alarms fitted.
"Everyone should have at least one smoke alarm on every level of your home and the safest option is have those linked together. This will give the earliest warning if there is a fire in your home."
The cause of the fire is still under investigation.