Asda has recalled four batches of pre-lit Christmas trees because a small number of damaged bulbs could cause an electric shock.

"Although nobody has been hurt, we are asking anyone who has bought one of these trees to bring it back to their nearest store where they will be given a refund," the retailer said.

The affected products are: Pre-Lit Pine Christmas Tree, 6ft, £15; Pre-Lit Black Christmas Tree, 6ft, £27; Pre-Lit White Christmas Tree, 6ft, £27 and Pre-Lit Extra Special Greenwood Tree, £49.