Help save a fellow Londoner’s life

If I knew where a defib was within easy walk/access and there was nobody more qualified to use one or perform cpr I would definitely give it a go and try to save a life. In South and South East London tubes/overground not as easily reachable as North. Have had cpr training but decades ago and could use a refresher course, but as a pensioner now there seems nothing locally without fees to pay, unlike in past years when it was free. Haven't seen defibs locally in Greenwich,  would like to see them where most people go- pubs, cinemas, libraries/community areas, major convenience stores - Sainsburys local, Co-Op's, Tesco Express etc. Local news like the Greenwich council weekly paper should feature locations. Quick Google search maybe for nearest one possible if they are equipped with satellite locations? I'd sign up for a free course if local for sure. Convince Greenwich Council (and all councils who use forms of news distribution) to do more to make people aware of locations and how to use defibs in their weekly news to every resident. It's full of useless info so shouldn't be hard to get a space for something really important!!

I'd hope that the number of passengers around would include others more medically-qualified than myself, so I don't see these as a bad thing.
I would however expect some station staff to be present and that they'd have received the approproate training - and that that would be reflected in their pay.
I can also foresee possible misuse - either accidentally (eg before normal CPR had been delivered) or with malicious intent - another reason to ensure there are enough staff present at stations and on plarforms.

And, with the increasing Americanisation of those willing to sue after occasions of mistakes or misuse, what protection will there be for the well-intentioned?

I learnt to use a defibrillator on a Red Cross first aid course some years ago. But a refresher would be very welcome as of course being with someone in cardiac arrest would be very stressful. I remember that the machine gives instructions so that could be reassuring. Good luck with this valuable initiative 

Unskilled.  I am a retired teacher in her 80s.  I have not in my long career ever received life saving skills other than s specific advice if I had a child with a specific illness..e.g. ype 1 diabetes/  I doubt I would now feel confident enough to use heart resuscitation but if there was no alternative person I would be horrified if I didn't know the basics and then would of course do what I could.

whilst it is great to have difib equipmewnt on the underground, pehaps improving the air quality on the underground woul more dramatcally reduce events,  

perhaps dictator Kahn should have thought about this before the ULEZ lies

I would not feel confident as I am concerned about causing harm by not using it correctly e.g I don't know at what point it should be used and where to place it. I'm happy to take a practical lesson on when and how to use it. 

I was trained in Emergency First Aid & Defib by a firefighter. 

Once I saw a defibrillator I saw how easy it was to use. I am aware that once the patient has the pads on it is the machine that makes the decisions. Follow easy instructions, pictures and written, I think. Very unlikely to cause any harm using. Not using the defibrillator increases the very real risk of death.

I already know but would welcome an update