Twenty firefighters tackled a fire caused by a cardboard box that fell in front of an electrical heater at a house in Sutton.
Four fire engines were called to the blaze in The Causeway shortly after 6pm on Monday, March 20.
Two people escaped the fire before crews from Sutton and Mitcham arrived.
They were not reported to have any injuries.
The blaze was brought under control shortly after 7pm.
It is understood the fire was caused when a cardboard box fell in front of an electrical heater.
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