A crack down has been launched against shopkeepers who flout firework laws.

Local Trading Standards chiefs have warned rogue retailers they could face a hefty fine and up to six months in jail.

The warning follows complaints, some going back to the start of July, about fireworks being discharged and causing a nuisance.

Officially, fireworks did not go on general sale to the public until this week. Half of those hurt in firework-related incidents are under 15, even though the law prohibits sales to anybody below 18.

Trading Standards officers say they will be working closely with the fire service and police in the run up to November 5 to clamp down on illegal sales.

Martin Wood - chief officer with West Yorkshire Joint Services, which oversees Trading Standards - said: "All fireworks must comply with BS 7114 and be safe. It is illegal for anyone under 18 to be sold fireworks, and that includes sparklers. It is also illegal to break-open packs of fireworks and sell them individually.

"Last year this service successfully prosecuted a number of offenders who sold to children, resulting in heavy fines being imposed. This year will be no exception."

Councillor Graham Clarke, chairman of the Trading Standards committee, said: "It distresses me to hear of so many needless injuries to our young people.

"We must stop fireworks getting into their hands.

"My message to them is get wise or get hurt. Fooling with fireworks is a dangerous game and you could be scarred for life."

Anyone concerned about illegal sales of fireworks should phone the Trading Standards consumer helpline on 0113 3848848.