NEW SEATBELT LAW AND THE AUSTIN SEVEN

Children Over 3 Years Old up to 135cms in height (approx 4' 5") or 12th birthday whichever they reach first.

If a vehicle has no seat belts, a child aged 3 years and over may travel in a rear seat unrestrained but never in the front seat without seat belts. 

Children Under 3 Years Old

A child under 3 years old may not travel in cars, vans or goods vehicles which do not have seat belts installed. If there are no seat belts fitted in the vehicle, then a child under 3 years old may not travel in it.