Modern fridges and freezers are the most dangerous household appliance in a blaze, a fire service said as it called for tougher safety standards.
The London Fire Brigade (LFB) said fridges and freezers were of particular concern because they contain large amounts of plastic and highly flammable insulation, which can cause large fires that spread quickly with highly toxic gases.
The LFB's report into blazes started by electricity or in electrical appliances follows a fire in Neasden, north London, last year that began behind a chest freezer and resulted in the deaths of six people.
More top news
Six people have been killed and a seventh is critically injured after a multi-vehicle crash in Birmingham in the early hours of Sunday.
It will be a frosty start for many across the UK with slow-clearing mist and fog across parts of central and southeastern England.
The prime minister says she has proven the "doubters" wrong but still faces opposition from both sides of the Brexit line.