I bet this is the Hip Case again
I think it depends on the details of the case
I think this is after-the-event (ATE) insurance and you can browse here
http://www.ulpltd.co.uk/page/660/after_the_event_insurance
somewhere it says single fee 30% of the amount claimed
eek !
anyway in Hip Lady - the NHS has admitted liability - so they would be going to court on quantum alone, and so as usual she should be asking the solicitor she has hired - perhaps she has and just hasnt told you....