compensation for money she would have earned if she had carried on working and loss of earnings since 2004 and compensation for the injury and the fact she is now walking with a stick and I imagine had a pretty active lifestyle beforehand it seems fair. The fact that it is a pre trial settlement indicates that she had a strong case and both parties settled to avoid costs and for the NHS potentially a higher settlement. Perhaps the claim would have been higher if she had not had collagen injections in her lips in 2003 as that must have impacted her earnings during that year.
http://en.wikipedia.org/wiki/Leslie_Ash
Summarises it pretty well.