5 of the best bike helmets

Casco Warp II
£229.99, cultracing.com
Promoted as the ultimate track competition helmet and worn by the GB track squad, the Warp II is lightweight, extremely solid and heat resistant up to 100°C – so you'll evaporate before it does. Topped off with an aviators-style mirrored visor, the helmet should fit your bonce beautifully thanks to its Disc Fit comfort system.