Merseyside Fire & Rescue Service confirmed that the fire, in which four people died, began with an electrical event that sent a lithium-ion battery into thermal runaway.
Source update
In its 1 October statement, the service identified an electric scooter battery. This update does not change the incident date: 22 September.
Editorial scope
We do not identify a device brand or model or attribute responsibility to a manufacturer. Confirmed findings are kept separate from details the source does not establish.