http://www.nfpa.org/PDF/osvehicle.pdf?src=nfpa (pdf)
via this comment on dKos which provided the following quote:
79% of U.K. car fires were "malicious." Highway vehicle fires have a different profile in the United Kingdom. In 2001, 102,100 road vehicles resulted in 68 fatalities and 689 injuries. The 102,100 vehicle fire total was the highest seen in the decade. Eighty-eight percent of these vehicles were cars. Seventynine percent (70,100) of the car fires were "malicious." The number of malicious car fires has been climbing since 1998, increasing 32% from 1998 to 1999, 12% from 1999 to 2000, and 11% from 2000 to 2001. Non-malicious car fires fell 5% from 2000 to 2001. As in the U.S., malicious car fires were more common at night or the early hours of the morning, while other car fires were more spread out and peaked in the late afternoon and early evening.
The number of malicious car fires has been climbing since 1998, increasing 32% from 1998 to 1999, 12% from 1999 to 2000, and 11% from 2000 to 2001. Non-malicious car fires fell 5% from 2000 to 2001. As in the U.S., malicious car fires were more common at night or the early hours of the morning, while other car fires were more spread out and peaked in the late afternoon and early evening.
