Here in the Netherlands we have a rather dense network of defibrillators. One of the last times I did a ERO training, I heard that there was a greater problem having people available to operate defibrillators and there was an appeal to enlist yourself to become an defibrillator operator. That means that you will receive a call when in your neighbourhood there is a need for one and directions where to find the closest defibrillator. Usual several people will messaged.