There are four divisions which fireworks fall under, which relates to type of item, level of hazard, net explosive content and noise level.
Category 1 or F1 Fireworks, are fireworks which are intended for use in confined areas, including fireworks which are intended for use inside domestic buildings (i.e. indoor fireworks).
Category 2 or F2 Fireworks are fireworks which are intended for outdoor use (i.e. garden fireworks) and can have a minimum safety distance for operators of 8 metres, and spectators between 8 and 20 metres.
Category 3 or F3 Fireworks are fireworks, which are intended for outdoor use in large open areas (i.e. display fireworks for open areas such as fields) and can have a minimum safety distance of 15 metres for operators and 25 metres for spectators.
Category 4 or F4 Fireworks are not available to members of the public and are for use by persons with specialist knowledge (i.e. professional firework companies).