Unless the law is changed to disallow jury trial for crimes which could result in a prison sentence (as King Blare currently is trying to do) then I think the accused could opt for trial by jury. If that's the case, the jury could decide to Pervert The Law, which would result in it being effectively nullified. This has been done recently (read the article).

Appeals can be made on the basis that the particular action (gaoling someone for organising a mummers play) contravenes Human Rights legislation.

;-)