@frankPodmore@gowan I guess the idea is that if you mandate helmets it will reduce bicycle use (which may be part of the reason you'll seeess deaths). Less cyclists in an area raises the risks for those cyclists that remain. Drivers feel more comfortable with helmeted cyclists, and studies show they drive closer to those cyclists that wear helmets compared with those that don't (see 'risk compensation')
I wear a helmet cycling kids to school fwiw.