@43066 , you're right that I should have worded what I intended to convey more clearly. Legal action could be taken, but it's got pretty much as close to zero chance of success as is conceivable, provided that the circumstances merited, or appeared to merit, the attempt. Of course, that there's essentially no prospect of success significantly reduces the chance that anyone will try to sue you once they've taken advice.
There's loads of detail in this report from Resuscitation Council UK:
Their headline point 6: "The courts have always looked benevolently on those who have gone to the assistance of others."
From the executive summary: "The likelihood of causing harm by performing CPR or using an AED is very small indeed. Nevertheless, there has been some concern that should an attempt to resuscitate someone having a suspected SCA result in harm, a legal claim could be brought against the rescuer.
To date, there has been no reported successful claim to this effect." ... "There are no statutory laws covering resuscitation but a potential liability could arise if a civil claim were brought by the victim, or their family, against someone on the grounds that intervention occurred without their consent and so constituted an assault and/or battery." ... "Anyone who attempts resuscitation would only be legally liable if it could be shown that the intervention had left a person in a worse position than they would have been in had no action been taken.
In the case of a cardiac arrest, this would be virtually impossible, since without intervention death is inevitable. Added to that, an AED will only deliver shocks if it detects a pattern consistent with a cardiac arrest."
From further on in the report:
"Although there have been a few cases in the UK when a claim for damages has been brought against a member of the public or a first aider who has attempted resuscitation, there have been no reported cases in which someone has successfully sued anyone who came to help them in an emergency situation."
So, your concerns with what I originally said are both fair and don't really change how one ought to act in the circumstances. You
can be sued but you're not going to be sued successfully if you act in good faith, and certainly not unless you've done something way outside the bounds of the procedure. So if you're following instructions from 999, or printed or recorded instructions, there's a slight chance of ending up in court but a truly negligible chance of any penalty. Certainly not something that ought to affect one's moral inclination to try to save the life of someone in peril.
The duty of care thing is interesting. Absent a medical qualification, the duty of care means that once you have intervened at all, you have to then do everything
that you can. For the average member of the public, this is going to amount to fairly few rounds of CPR because it's a fairly physically demanding procedure. It's true that this does load some responsibility onto you. In normal circumstances, this is going to mean taking all practicable steps to get help and hand over to someone qualified.
@name_required 's post conveys my sentiment about this well. I'm trained and I have no qualms about helping someone, be it in the workplace (where I would be expected to respond) and in public. In practice, on my crowded London commute, there have always been people closer to the incident and/or better trained to handle, but nonetheless I carry a face shield to remove a further barrier to the instinct to act if required.