Hydrogen burns with a blue flame, I remember the school experiments, splitting water into hydrogen and oxygen and the oxygen would relight a glowing taper. The unit looked like this
and was a standard school experiment, this
has been shown many times as an electric bus fire, this one was compressed natural gas happened on April 16 near the Italian city of Perugia, with a city bus bursting into fire. The flames coming out of the roof looked like a scene from a space launch program or a CGI effect, although the video is legit.
Also
On 22th November a press note was sent with the signature of the Fuel Cell Hydrogen Joint Undertaking and JIVE project. It reads: «On 28 October 2021, a large fire broke out in a depot of the transport company Arriva in Doetinchem, in the Dutch province of Gelderland. An investigation by local and regional safety authorities is underway to determine the cause of the fire. A diesel and a hydrogen fuel cell electric bus were in the maintenance building, which was destroyed in the fire. Firefighters and police reported that there were no casualties or injuries».
this time it was hydrogen gas.
Be it a battery, petrol, gas, or diesel there are loads of bus and car fires, the problem with the battery is putting the fire out, seems standard way is some countries is to put whole car in container of water.
With caravans the distance I seem to remember is 2.7 meters from a building, at this it also means no problem with a TT supply even if building is TN, as long as the car is parked 2.7 meters away from a building there is not a large problem, however would not want one in an integral garage.
The Liverpool car park fire does point out the problems of having cars so close, be it electric or petrol, however it was the building design which did not contain the liquid fuel to one area, allowing the fire to spread. I would have thought electric cars are safer as far as fire goes, as the fire is contained.
all started with one Landrover is seems.