Thanks to everyone for your replies and comments! I believe he was goinf to the hospital to see the specialist today but do not have any further information on what they found and will have to ask my GF later. I know that I need to get an exact explaination of what happened from him before we decide whther to make a claim but this is not the easiest of things to do as his memory is not as good as it used to be.
Thanks again!
EagleStar