80 firefighters tackle Belgravia blaze
People are being urged to stay away from the area around Cadogan Square
Around 80 firefighters - asn 12 fire engines - are at the scene of flat fire on Cadogan Square in Belgravia.
Part of the roof of a mid-terraced block of flats is alight. London Fire Brigade tell us around 15 people left the building before they arrived.
Station Commander Matt Cole, who is at the scene, said: "The fire is in the roof space of the building and crews are working hard to bring it under control.
"One of the Brigade's 32-metre turntable ladders is being used to get water on to the building externally from height.
"likely to be a protracted incident"
"Cadogan Square is currently closed and there are severe delays, so please avoid the area where possible.
"This is likely to be a protracted incident, with firefighters likely to remain on scene throughout the evening."
The Brigade was called at 1346. Fire crews from Soho, Lambeth, Chelsea and surrounding fire stations are at the scene.
The cause of the fire is not known at this time.