Cornerstone Barristers. The 12 month pupillage is normally divided into three periods, each of four months duration. During your first six months, you will make regular trips to Public Inquiries, the High Court, the Court of Appeal and the Supreme Court with members of the set. In your second six, you will be in Court on average three times a week. Practice areas include Planning, Housing, Civil Litigation, Compulsory Purchase, Environment, Licensing, Local Authority, property, public law, and regulatory law.