The use of fireworks in the UK is regulated by the Fireworks Regulations 2004. Key rules for home use:
It is illegal for anyone under 18 to possess a firework in a public place. This includes sparklers — a common misconception is that sparklers are outside the regulations. They are not.
Consumer fireworks (Category F2 and F3) are subject to a 120 decibel noise limit. Professional display fireworks (F4) are only available to licensed professionals. Most garden fireworks sold in supermarkets and shops are Category F2.