Five fire engines rushed to a fire at a building site on Blackheath Road in Greenwich this afternoon.
Nearly 30 metres of the wall cavity was alight, causing the construction workers to flee.
London Fire Brigade were called at around 12:30pm today, August 27, with around 35 firefighters and five fire engines attending the building on Blackheath Road.
LFB said part of the wall cavity between the third and fourth floors of the building was damaged by fire, but there were no reports of any injuries.
Station Commander Lisa King, who was at the scene said: "Around 28 square metres of the wall cavity was alight.
"Crews used specialist cutting gear to gain access between the brickwork and bring the fire under control."
Fire crews from Deptford, Lewisham, Lee Green, East Greenwich and Peckham fire stations attended the scene and had the blaze under control by 2:30pm.
The cause of the fire is under investigation.
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