Can appeals be successful based solely from the evidence you submit at the time you apply for an appeal or do you always have to go before a panel?
A date will be arranged for the hearing, and the panel would have to meet at that scheduled time in order to take its decision.
You don't have to attend if you don't want to - the panel will reach its decision without you.
However, your chances of a successful appeal might be reduced if you don't attend. There may well be questions the panel would have liked to put to you in person.