a 16-year-old girl charged with arson after she discarded a cigarette causing a city centre shop blaze which claimed the life of a firefighter had the charge dropped today .
the girl - who was just 15 at the time - is said to have dropped a cigarette to the floor while standing near the shop 's fire exit which rolled underneath the door and set boxes alight .
she was originally charged with arson being reckless as to whether life was endangered , but was cleared having that the fire could not have been started accidentally , further investigation led to the conclusion a discarded cigarette was discarded .