Thanks everyone whos answered, submitted my WTR applcation this morning, the clerk said I was borderline but she couldnt say as it wasnt her decision.
Speaking to my mum, she belives the damage was caused when i was 17.... I had a really bad cold, and treated myself to all the Lemsip Max Strength Drinks, and Beechams Cold & Flu Powders i could find, she's a nurse and noticed how much id taken and they got me into hospital for 4 days!, they said then there maybe some liver damage apparently. The problem is, i completly forgot about this when i completed my medical form that asked if id ever been into hospital and why. Now im worried if i mention it, it'll look like im hiding something or lied on my form...problem is it also explains the damage without the need for further testing i guess.
Oh what to do?