EVERY week in Scotland the equivalent of a double decker bus full of people have a cardiac arrest.

Someone who is having a cardiac arrest will suddenly lose consciousness and will stop breathing normally – or stop breathing entirely.

Doing CPR (Cardiopulmonary resuscitation) buys time for the ambulance to arrive and can double the chances of someone surviving.

So, Save a Life for Scotland are asking everyone in Scotland to be CPR ready.

There are five things to remember:

1. If someone collapses and is not breathing, first call 999 and then shout for help.

2. Clasp your hands together, lock your fingers, knuckles up, lock your elbows and keep your arms straight.

3. Begin hands only CPR pushing down hard to the beat of '500 Miles' on the centre of the person's chest.

4. Keep going until the ambulance arrives.

5. Remember, don't delay in starting CPR. Any CPR is better than no CPR.