All new cars will be fitted with speed limiters from 2022 under tough EU safety rules.
The Intelligent Speed Assistance (ISA) black boxes will use GPS to work out what the speed limit is and will then ensure the car doesn’t break it.
New models will need to have an ISA fitted as standard within three years after the European Commission approved the legislation.
This will include cars in Britain even if Brexit happens because the UK’s Vehicle Certification Agency said it will still mirror the EU rules.