Motorbikes and scooters could be fitted with electronic devices to keep them to the speed limit, Transport for London board papers reveal.

Concern is rising over the number of motorcycle casualties across London, and TfL are considering introducing intelligent speed adaptation (ISA) devices to cut accident rates. A report has been commissioned into the use of ISA devices, which will be published this summer, and road manager Peter Hendy has suggested that the idea be looked at by TfL's safety committee.

In Barnet, a six per cent reduction in the number of casualties was achieved last year, while outer London boroughs recorded, on average, a fall of 14 per cent.

"This is one of a number of things we are considering," said a spokesman for TfL. "But we would hope that other measures could achieve cuts in casualties."