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:
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