As a parent I was disappointed to see so little by way of advanced notice of this revision of road safety laws in the UK.
The new regulations come into effect today and non-compliance can land you a £30 on the spot fine or up to £500 if the case were to go to court.
In a nutshell you are now required to use 'correct child restraints' for children of various shapes and sizes, please see the thinkroadsafety dot gov dot uk website for specifics.
Thankfully I am responsible and already comply.