London Fire Brigade / PA MediaA block of flats in north-west London has been evacuated after a large fire spread from a neighbouring electricity substation.
About 80 residents have been led to safety after the roof of the building on Aberdeen Place, Maida Vale caught alight from the blaze which broke out at about 05:30 BST.
No injuries have been reported, although London Fire Brigade (LFB) has urged other local residents to keep their doors and windows closed.
More than 100 firefighters are tackling the flames, which have sent large clouds of grey smoke into the air.
Sanna Daw, who lives in a nearby block told the BBC she had seen "bright orange flames" that were 6 - 8 ft high (about 1.8m - 2.4m) and a "huge billowing black plume" of smoke rise from the burning building.
"At one stage there was a big eruption... I was quite scared," she said.
London Fire Brigade (LFB) said it had received more than 160 calls about the fire, which it described as "very visible".
The cause of the fire is not currently known.
Paul Beaver / XThere have been no reports of any disruption to the electricity supply in the area.
UK Power Networks, which runs the facility said the substation powers surrounding areas and it remains operational.
A spokesperson added: "Our teams are working with the fire service to make the equipment safe.
"This is an isolated incident and customers' supplies were not impacted."
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