Earlier the same day, a 34-year-old cyclist suffered serious head injuries after coming off his bike in Guildford Road, West End.

BBC: Box Hill

With a wheel off design and super flywheel, the iPhone connected bike trainer is engineered to produce an ultra-realistic road feel, equivalent to the inertia of an actual rider on the road.

ENGADGET: Wahoo KICKR Power Trainer lets iPhone cyclists feel the simulated burn (video)