London Mayor Boris Johnson has announced that there are to be more 20mph speed limits with eight new locations in the capital being trialled.

In 2013/14 more than 170 miles of London roads have had the 20mph limit introduced and almost 25% of all roads in the capital are now 20mph.

Boris Johnson said: "Lower speeds have the potential to significantly improve road safety while enhancing the environment for walking and cycling."

Leon Daniels Transport for London surface transport managing director said: "Piloting 20mph speed limits form a key part of our continuing work to make central London safer, pleasant and more attractive for all."

Further 20mph zones have recently been introduced in Edinburgh, Manchester, Croydon, Slough, Cambridge and Derby.