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Because if you are unfortunate enough to crash - especially in a remote location - you are expecting an ambulance crew (who may not have adequate PPE) to favour you over someone who stayed at home or who has, like me, an underlying health condition who has a more pressing need of emergency care. I know ambulance crew who are unable to do full CPR - so chest compressions only - since they have inadequate PPE. We all have to change our behaviour.
Might be wrong but 30 minutes - 1 hour anymore = being a dick.