Dr Hilary's CPR masterclass

Would you feel confident performing CPR in an emergency? Many of us wouldn't, yet knowing these simple steps could save a life.

What should you do if you discover someone who isn't breathing? - Shake, check for a response and shout for help.

- Check for normal breathing and a pulse. Listen to their mouth, put a hand over their mouth to feel for breath and look at their chest to see if there is any movement.

- Check their airways to see if their throat is blocked.

- Call 999 and begin CPR.

How to perform CPR:

Step 1: Tilt chin up with the forehead back.

Step 2: Administer two rescue breaths by keeping the chin lifted and forehead back, Pinch the nose and cover their mouth with your mouth. Look down to see if chest rises.

Step 3: Perform 30 chest compressions. Use the heel of your right hand on the lower end of the breast bone with your other hand placed on top of your right hand. Keep your arms straight.

Step 4: Perform two more rescue breaths.

Step 5: Repeat this cycle of rescue breaths and compressions until help arrives.

CPR on a child: The steps for a child are very similar, except for one key difference for children is that their rib cages are even more springy so you need use even more force when performing chest compressions.

You should push down to one third of the depth of a child's chest.

CPR on a baby:Children under the age of one have much smaller faces so when administering rescue breaths ensure their nose and mouth are covered.

Instead of using both hands, use the tips of two fingers to perform compressions on the bottom of the baby's breast bone between the two nipples.