Children will be banned from cycling to a south London secondary school unless they display number plates on their bikes.
Stanley Park High in Carshalton, south London, is introducing a registration scheme to allow the public to report irresponsible cycling by pupils.
Youngsters will soon be issued with number plates which "must be displayed when riding to and from school".
Head teacher Amit Amin said the measure is in response to incidents of children cycling in a way that "endangers themselves and others".
In a message published on the school's website, he wrote:
Students without a number plate will not be permitted to cycle to school, or lock their bicycles on school grounds.
The plates are being introduced on October 1
It's part of a wider scheme aimed at encouraging cycling
It also features subsidised bike lights and maintenance workshops
Our absolute priority is the safety of our students, and the aim of this initiative is simply to ensure their safety as they travel to and from school. They should be looking to make active journeys easier and more attractive. Worryingly, this behaviour seems to be part of a trend of head teachers trespassing on parental responsibilities.