Dilemma! The twins are ready to move into the forward facing upright car seats which means my 2 year old will be giving her one to one of the twins and she will have a backed one without inner seat belt (normal seat belt though)... just seen that one is minimum of 15kg.. she's 14.3kg.. I can't afford to fork out for a third seat just to he used for a few months!!! She will also have an additional safety harness on it too that we bought from John Lewis called the Belt Upp. That will be okay won't it? Don't bombard me with 'regulations' bullshit, I just want honest mum to mum scenarios.