Around 20 people have been evacuated to keep them away from “plumes of black smoke” coming from a basement fire in Chelsea.

Four fire engines and around 25 firefighters are tackling a fire at an office block in King's Road.

The office block includes a car park at the basement level – and this is where firefighters believe an electrical fire started.

A London Fire Brigade spokesperson said: "An electrical fire is causing plumes of black smoke to vent out of the office block’s roof. Around 20 people have left the neighbouring properties as a precaution.

“The brigade was called at 3.17pm on Thursday (October 25). Fire crews from Kensington , Soho, Battersea, and Chelsea fire stations are attending the incident.”

The cause of the fire is not known at this stage.

Follow our live blog below for the latest developments on the fire.

Road reopened!

All roads are open again in and around Sydney Street.

View from King's Street

Firefighters in action in Sydney Street
Firefighters in action in Sydney Street (Image: Julia Gregory)

No injuries but traffic is heavy

Kensington and Chelsea Police have tweeted: “Sydney Street in #Chelsea is currently closed between Kings Road and Fulham Road whilst @LondonFire access the damage after a fire has been put out.

“Heavy traffic in the Chelsea area. No injuries. 211 and 49 buses not serving Sydney Street.”

View from the street

Fire engines are still outside the office block, as you can see here, and firefighters are busy combating the fire.

Fire engines outside the office block
Fire engines outside the office block (Image: @PaulGriffin74 / Twitter)

Where is the fire?

Fire engines are parked outside an office block in Sydney Street, just off Kings Road and just a few yards from the Metro Bank opposite Chelsea Old Town Hall.