Co-sleeping safely — what the Lullaby Trust really says

Co-sleeping is one of those topics where the headlines and the guidance don't match. "Don't co-sleep" is the soundbite. The actual Lullaby Trust position is more nuanced — and a lot more useful.

This is the version your midwife wishes there was time to explain. Sourced from current Lullaby Trust guidance and discussed in the postnatal ward I work on.

The actual UK position

The Lullaby Trust does NOT say "never co-sleep." They say:

1. The safest place for a baby to sleep is in a separate cot or Moses basket in the same room as you for the first 6 months.
2. BUT — many parents will end up co-sleeping at some point, often unintentionally during night feeds.
3. So the focus is on making co-sleeping safer when it happens, rather than just telling people not to.

That second point matters. Studies suggest 50%+ of UK parents co-sleep at some point in the first 6 months. Telling them "don't" doesn't work; teaching them to do it safely does.

When co-sleeping is NEVER safe

These are the absolute red lines. Don't co-sleep if:

• Either parent has been drinking alcohol, smoking, or using drugs (including some prescription drugs that cause drowsiness)
• The baby is premature (born under 37 weeks) or low birth weight (under 2.5kg)
• You're sleeping on a sofa or armchair — this is much more dangerous than a bed and is associated with significantly higher SIDS risk
• You or your partner are extremely tired (the kind where you might sleep through baby crying)
• You're a smoker, even if you don't smoke in the house — risk to baby is still elevated

Safer co-sleeping rules

If you're going to co-sleep, the Lullaby Trust's safer-sleeping rules:

1. Keep pillows, duvets and blankets away from baby — covering their head is the main risk
2. Sleep baby on their back, between you and a wall (not between two adults — baby could be rolled on)
3. Make sure baby can't fall out of bed or get stuck between the bed and a wall
4. Don't let other children or pets in the bed with baby
5. Keep the room cool (16-20°C) — baby in light layers, not bundled up

Bedside cribs (the middle ground)

If you want baby close but the safest sleeping arrangement, a bedside crib is the answer. It attaches to your bed at the same height, with one side open so you can see and reach baby easily, but baby has their own separate flat sleeping surface.

Brands like Snüz, Chicco Next2Me, and Bednest are all good. They're £100-200 used on Facebook Marketplace and gold-standard for safety.

Night feeds — the high-risk moment

The most dangerous co-sleeping isn't planned — it's falling asleep while feeding baby on a sofa or armchair. Most fatal accidents happen this way.

If you're doing night feeds:

• Feed in bed, not on a sofa or chair
• If you might fall asleep, set things up safely BEFORE you start feeding — pillows clear, baby in a safe position
• Tell your partner to wake you if you do drift off

If your baby was premature or has reflux

Both increase SIDS risk. Talk to your health visitor about your specific situation. Generally:

• Cot or bedside crib for sleeping (no co-sleeping)
• Flat surface — never elevate the head of the cot to manage reflux unless your paediatrician has specifically said so
• Always on the back, never the side or stomach

Safer sleep across the first year

The risk of SIDS drops dramatically after the first 6 months. By 12 months it's vanishingly small. Most safer-sleep advice is concentrated on the first 6 months because that's where the risk is.

For full hands-on training on infant safety — sleep, fevers, illness, choking, CPR — book my 2-Hour Parent First Aid course. It's the calm, evidence-based version of all this, in your home.

Eva Levinson is a Postnatal Midwifery Assistant for the NHS, a Doula UK trained doula, and an Ofsted/HSE compliant first aid instructor. She runs And Chillax in Anerley, South London.