New parents should be warned that sleeping together with babies under the age of one increases the risk of sudden infant death, health officials at the National Institute for Health and Care Excellence (Nice) have said.
The health group has produced new draft recommendations calling for all parents to taught about safe sleeping habits in a bid to cut the number of cot deaths.
"Falling asleep with a baby, whether that's in a bed or on a sofa or chair, is risky," said professor Mark Baker, the clinical practice director at Nice.
"This is especially important if parents drink alcohol, take drugs or expose their baby to tobacco smoke."
More top news
Grant Shapps and Lord Feldman should stand down for their alleged inaction over bullying claims, father of activist who killed himself says.
Scans show there is a 90% chance Tutankhamun's tomb contains a hidden chamber - the last resting place of Queen Nefertiti.
A pregnant woman suffered broken bones and is to undergo surgery after being thrown on to the bonnet of a car in a collision.