oh good gawd..
ladybarbara, whilst my utmost sympathy goes out to you and your husband for what must have been a dreadful accident, it was an accident for gawd sake, it does sadden me that we are turning to the American, overly litigious, way of dealing with everything!
Why does anybody other than your husband have to be at blame, he tripped over a kerb, he should have been looking where he was walking, if the light levels were low he should have been paying more attention.
That said I do wish him a speedy recovery.