Firefighters are issuing a safety reminder about smoking after a fire at a residential block on Palgrave Gardens in Marylebone.
A balcony was destroyed and part of a four roomed flat on the first floor was damaged by the fire. One person left the building before the Brigade arrived.
One of the Brigade's 32-metre turntable ladders was used at the scene as an observation tower.
The fire is being treated as accidental and is believed to have been caused by the unsafe disposal of smoking materials.
A London Fire Brigade spokesperson said: "If you smoke it is vitally important you stub it right out, preferably in an ashtray.
"Always ensure your cigarette is completely out when you’ve finished smoking it. If you don’t, you risk causing a fire as you don’t know what it may land on which could potentially start a fire."
The Brigade was called at 1749 and the incident was over for firefighters at 1843. Four fire engines and around 25 firefighters from Soho and Paddington fire stations attended the scene.