I need to buy a second set car booster seats for the DC and it’s struck me I’m out of touch with the requirements 
I’ve had a brief research but am being constantly interrupted by the lil darlings, and finding the info conflicting...
I know mothercare advise and do fittings but god knows where my nearest one is.
My DC 9 is exceptionally tall and currently in a booster without a back, DC 5 is also quite tall and in a basic high back booster with ordinary seatbelt.
What do you use for yours ?
TIA