Under BS14035, there are also now Category 2 fireworks that require a longer distance of 8 metres, providing potentially better effects than 5 metre fireworks but without the fallout of Category 3 fireworks.
It is not illegal for a firework to be set off at less than the minimum safely viewable distance; however, in the event of any injury to a spectator, the firer might be liable if the distance was too short.