I didn't know anything about making meth until today.
Apparently meth labs can be and are run in all sorts of places, including car boots, and they can and do start fires.
Which may or may not be germane in this case.
The story of the car fire on the M61 was dramatic and the finding of the placenta in the burnt-out shell was even more so. The original story was that a woman had probably given birth on the back seat of the car, where there was not only a placenta but also "other signs of childbirth". This was before CM's name was published.
I took the prosaic view that the fire was caused solely by the car being an old banger that should never have been on the road, but who knows? I wonder what the cause of the fire is recorded as by the insurer (if there was one), or the fire service, or police, or whoever else is supposed to investigate such things, if anyone is.