Thanks for the advice. I'll have a look on google and see if I can find an osteo in my area for us. I tend to shy away from chiros after a bad experience and am more of a physio girl myself but I have heard lots of great things about osteos so will give it a go.

Ca Plane- he has been in a car multiple times since the accident and was fine in his car seat (luckily we had 2 as the one involved in the crash is now gone) so I'm hoping he will be ok with that side of it but will take note of your tips if he starts showing signs of fear.