Ten of 11 children’s Halloween costumes tested by the Chartered Trading Standards Institute did not meet UK safety rules. The outfits were bought at random from third-party sellers on major online marketplaces; the 91% failure rate applies to this test group.

Inspectors found missing safety information and design features that could put young children at risk of strangulation. Tests conducted with the London Fire Brigade also showed that costumes could catch fire quickly near an open flame, such as a candle in a carved pumpkin.

Trading Standards and fire chiefs are warning parents about the risks. UK law treats children’s fancy dress as toys, so the outfits must meet flammability standards. Compliant costumes must carry a UKCA or CE mark and identify a UK manufacturer or importer by name and address. Some designs must also warn users to keep them away from fire.