No. Are you talking about appealing at the Crown Court?
People have succesfully won at this level whilst representing themselves. I believe justice is more likely to be done at the appeal court, with a fully trained judge present.
I represented myself at magistrates and would never put myself through that again. When all eyes are accusing and you are alone, it is the most daunting and overwhelming experience. I still regret it today and the way I completely clammed up. I should have taken someone, anyone, as a cabbage would have done a better job of it than me. I'm very shy at the best of times so why I thought I'd find a voice is beyond me.
As I said though, many people have lost at magistrates and gone on to crown and won, without solicitors.
If you don't mind me asking did you lose a criminal /civil case based more on balance of probabilities than actual evidence?? Was it a lost case at all or just a general question?