HI Paul and RUTH
Firstly CONGRATULATIONS!!
Hope you are well and not suffering in the muggy weather we've had! I empathise with you! I think the law is very basic in if the belts are thier they must be worn,dont know how it works iwth what you are saying! Have read your shogun post so I know you WILL be using a seat! ALL I can say is if you are buying new alot of cars have what is called an ISOFIX point, with a child seat specially designed for that vehicle,the seat bolts to the frame of the vehicle and is much more secure than a seatbelt fixing(which is also perfectly adequate!)I know the terranos have this feature,also my kia sedona!If not I find the large Mothercares brill as they will come out to your car and try each and every seat for the perfect fitting!!!!!!! Good Luck!x