With Halloween just a few days away, the government is testing hundreds of children's fancy dress costumes to see just how safe they are.
ITV News did its own investigation and found some ignited in seconds.
Here are some tips to stay safe when Trick or Treating this year:
Video report from ITV News Consumer Editor Chris Choi
What should you look out for when buying a Halloween costume?
Halloween costumes are classed as toys rather than clothing so check it has the CE safety marking
To spot the logo is genuine look at the middle line of the E - it should be shorter than the other parts
Check the packaging and labels contain the manufacturer's name or registered trademark and that there are safety instructions
Always look for the 'flame-resistant' label
What should you avoid when buying a costume?
Beware of anything on it which could easily trail and catch alight such as tassels and capes
Buy costumes made of one type of material rather than layers
Costumes made of cotton and cotton/ polyester blends can be the most flammable
Polyester and nylon are flame-resistant materials - but they can still melt near fire
Wear clothes under the costume such as jeans and a woollen jumper to give some protection to the skin if a costume were to catch fire
Where should you buy it from?
Make sure you purchase items from a reputable shop
Be extra careful if you are buying online and always read reviews
Before buying also check for any product recalls - the Trading Standards websiteis a good place to look
What candle safety tips should you follow?
Many people are now switching to battery-operated LED candles for added safety.
But if you do use real candles you should:
Keep them away from any items which could catch fire
Place them on a heat resistant surface like a ceramic plate
Never leave a candle unattended
Always fully extinguish a candle before going to sleep or going out