Thanks Ali.

My almost 6 yr old is in a H harness with no booster. Simply because there is no booster currently available that she will fit into.
She is 30 kg and her eyes are well above the top line of the booster, plus the poor thing can not sit with her back flat as she shoulders are too wide.
She is def not ready to use just an adult seat belt but that's the best solution for her at the moment. Hopefully they make some bigger boosters.

I just wondered about the age of the restraints as the seat DD2 is using was DD1's so would be just over 5 yrs old.

I can't remember if I posted earlier about this but here goes

My 6 and half year old is to tall for the standard booster. Weight he is 22kg.. According to the QLD department of Transport who I have rung 3 times now after getting conflicting advice have told me he is perfectly safe and legal to go into a adult seat with a lap/sash seatbelt. Our local police told us a different story and said he was to stay in a booster regardless of height.. SO dept of transport told me to print of their info they have on their website and keep it in the car which we have done.