cores of firefighters were tackling a blaze at a pub in Trafalgar Square in “arduous” conditions on Tuesday evening.
About 70 firefighters were initially tackling the blaze at The Admiralty pub – but that number was later increased to about 125.
Station Commander Keith McDermott said: “Due to the arduous, challenging and hot conditions inside the basement we’ve increased the number of fire engines and firefighters at the scene.
“Around 150 people evacuated the pub and surrounding businesses before the brigade arrived. There has been no reports of any injuries.”
Earlier London Fire Brigade said in a statement: “We’ve got 10 fire engines and around 70 firefighters tackling a fire in a pub in Trafalgar Square. Half of the basement is alight.
“Please avoid the area if possible as there will be heavy traffic disruption.”
The Mall between Trafalgar Square and Horse Guards Road has been closed in both directions following the outbreak of the fire.
A Met Police spokesperson said: “Police are assisting with road closures following reports of a fire at an address in Spring Gardens SW1.
“No reports of any injuries at this time.”
The Brigade said that a number of people were evacuated from the pub, and surrounding businesses before firefighters arrived.
The fire brigade was called at just before 5.50pm. The cause of the fire is not yet known.