The more I think about it, the more a 30-yard penalty or no helmets seems the way to go.

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Road Safety Minister Mike Penning said there were no plans to make helmets compulsory, but added that he would keep the matter under review.

BBC: Quad bike helmet call by doctors

London Mayor Boris Johnson said there were no plans to require cyclists to wear helmets or to provide them for the capital's fleet of hire bikes.

BBC: Bradley Wiggins backs cyclist helmet laws after bus death