Judges, Courts of Appeal and the Supreme Court
The judge serves several crucial functions in Crown Court: ensuring fair trials, protecting defendants' human rights, advising the jury on legal matters, refereeing between defence and prosecution, and passing sentence on guilty defendants. In rare cases where jurors might face bribery or intimidation, the Criminal Justice Act 2003 allows judges to try cases without a jury.
If a Crown Court verdict is questioned, the Court of Appeal Criminal Division reviews whether the verdict is "safe." This isn't a retrial but rather an examination of the original trial's fairness and legality. The Court can order a new trial, dismiss the verdict entirely, or modify the sentence. Permission ("leave") is required to appeal, and cases are heard by judges without a jury.
The Supreme Court, created in 2009, sits at the pinnacle of the UK's court hierarchy. Prior to 2009, this function belonged to the House of Lords via 12 Law Lords who now serve on the Supreme Court. Cases reach this highest court only when they involve legal questions that significantly affect the public, and again, permission is required for a hearing.
Remember: The Supreme Court makes rulings that bind all courts beneath it, essentially establishing legal precedent for the entire UK justice system.