Never let your government get away with claiming that #bikeHelmets are "the first rule of bike safety".

Rule number one is infrastructure, and the 2nd is air+brakes+chain mechanical soundness of the bike, upright geometry of the bike, traffic awareness, ride with fingers on your brake levers and having practiced emergency stops, twenty is plenty... Helmets are for stunts or a footnote to "don't fall on your head" rule that applies to walking moreso than biking.