Child car seat rules for driving in Great Britain, Northern Ireland and Ireland

A route can cross two different thresholds

In Great Britain and Northern Ireland a ten-year-old measuring 137 cm has reached the height at which an adult belt ordinarily applies. On the Irish part of a journey, the same child at 34 kg is still below both Irish thresholds and needs a suitable restraint in an ordinary car. Check the requirements in each place the car will be driven. Source 1 Source 3 Source 4

A taxi exception is tied to the vehicle

Great Britain and Northern Ireland publish specific rear-seat conditions when a taxi has no appropriate child restraint. In Ireland the Road Safety Authority says taxi companies are not obliged to provide car seats, and a parent can arrange with the operator or driver to install their own. A family booking a taxi can ask about seat provision before accepting the trip. Source 2 Source 3 Source 5

A late change of plan has specific conditions

In Great Britain the adult belt exception for a child aged three or older requires a trip that is both necessary and unexpected and covers a short distance. Under-three children generally still require the correct seat, with a narrow exception for the rear of a licensed taxi or minicab. Apply the ordinary requirements when planning a regular school or airport journey. Source 2

Check the seat position as well as the threshold

A rear-facing child seat in front of an active front passenger airbag is prohibited in all three jurisdictions. Check the child seat and vehicle instructions for fitting. Ireland’s Road Safety Authority also recommends retaining an appropriate car seat until the child reaches 150 cm even where a child has already reached 36 kg. Source 1 Source 3 Source 5

Sources

• GOV.UK child seat requirements
• GOV.UK child seat exceptions
• nidirect child restraints and seat belts
• Ireland Road Safety Authority rules of the road
• Ireland Road Safety Authority child seat guidance