When Tony Blair announced radical changes to his mentor Lord Irvine’s job as Lord High Chancellor without warning in 2003, he provoked the wall-paper connoisseur and would-be Cardinal Wolsey into resigning. The horse-trading that followed gave us the Constitutional Reform Act 2005, which stripped the Lord Chancellor of his judicial role, set up the Supreme Court as the final Court of Appeal for the UK, and a new Department of Constitutional Affairs, with an elected MP to be secretary of state instead of a peer. It changed its name to the Ministry of Justice in 2007, and has mushroomed.