corrective surgery

i had an accident in 1986 on a moped, compound fracture tib&fib, wasnt set straight ankle was rotated outwards, calf muscle never grew back properly,  struggled on with life not wanting it to get the better of me, i recently went to doctors with aches and pains and he referred me to a lower limb specialist who said he can operate on my leg to correct the surgery 25 years previous, he asked why i hadnt had it done before now, but i didnt know they could do that, the surgery would take 6-12 months to complete, Do i have a case for a claim? Could anyone advise me if this would be possible after so long