Have you considered a claim via the Motor Insurance Bureau ??
They cover uninsured drivers but im not sure about ....other road users.
It costs nothing to file a claim, its a simple form... but be warned its not fast.....
Either way nothing much to lose....
www.mib.org.uk
I got some money back when i was hit by an untraced driver, it took 6 months and they considered that fast tracked !!!
PM me if you need any more info
Rob