At the Court of Appeal in the UK, the judges who preside are called Lords Justices of Appeal. Typically, a panel of three Lords Justices hears the cases, although sometimes a larger panel may be constituted for particularly important or complex matters. The Court of Appeal is divided into two divisions: the Civil Division, led by the Master of the Rolls, and the Criminal Division, led by the Lord Chief Justice. In addition to the Lords Justices, some senior High Court judges may also sit in the Court of Appeal when required.