The Fireworks (Safety) Regulations 1996

4.  Regulation 3 above shall not prohibit the supply of any aerial shell, aerial maroon, shell-in-mortar, maroon-in-mortar or combination to—

(a) any person whose trade or business, or part of whose trade or business, is the professional organisation or professional operation of firework displays;

(b) any person whose trade or business, or part of whose trade or business, is the supply of fireworks;

(c) any local authority for the purposes of a firework display;

(d) any person for use, in the course of a trade or business of his, for special effects purposes in the theatre, on film or on television; or

(e) any local authority, enforcement authority or other body, where that authority or body—

(i) has enforcement powers, conferred by or under any enactment, applying to aerial shells, aerial maroons, shells-in-mortars, maroons-in-mortars or combinations; and

(ii) before it purchases the goods, informs the supplier that the purchase is to be made for the purposes of ascertaining whether any provision made by or under any enactment and relating to the safety of the goods has been contravened in relation to those goods.