Faulty fuse boxes are causing five house fires a week in the capital, according to new figures by the London Fire Brigade.
They say defective wiring and components are behind the problem. New regulations are being announced which will require them to be flame proof from 2015.
There's been a five fold increase in fires started by fuse boards over five years.
It's believed the increase is because many homes have installations subject to product recall.
Also, sometimes the wiring is not fitted properly at the time the unit is installed.
Find out here if your fuse box unit is on the London Fire Brigade recall list.
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Before the killing, Peters searched the internet for "serial killers", "treatment of child killers in prison" and "premeditated murder".
Arriva Rail North, Greater Anglia and South Western Railway are all affected.