How do you know that the fire of London was an accident?
No one can know for certain.
The Great Fire of London was an accident. Because at 1am on Sunday morning on 2 September in Thomas Farriner's bakery on Pudding Lane started the fire. It may have been caused by a spark from his oven falling onto a pile of fuel nearby. The fire spread easily because London was very dry after a long, hot summer. This shows that it was an accident. -So proud of my answer :D
The Great Fire of London started by accident in a baker's shop in Pudding Lane in 1666. Pudding Lane is still there although the baker's shop was, of course, burnt down in the fire. At the time, dissident Catholics were blamed for the fire and a Latin inscription on the plinth of the monument to commemorate the fire blamed Catholics, although this was later deleted.