continued...
Making
sure there is no shouting or panic in the background
when you dial 999 reduces the chances of the police coming.
If you are really worried you could dial 999 and just tell ambulance
control that you have found someone unconscious. You can then explain what
has happened when the ambulance crew arrive.
If an
ambulance is not called and someone dies, the police will
come so that they can inform relatives and investigate the death.
Calling an ambulance might prevent them coming, and save a life.
Practice
putting someone in the recovery position, and learn how to do
mouth-to-mouth and chest compressions - following the instructions on
this website - so you will know how to keep someone who has overdosed
alive until the ambulance gets there.