What is Grayling talking about?

Apparently the Lord High Chancellor of Great Britain, the second most important Great Office of State,  Lord Keeper of the Great Seal  and Keeper of the Queen's Conscience has said he wants

 "to see our Supreme Court being supreme again"

If he means the Supreme Court of the United Kingdom - it has never been supreme but has always been subject to the jurisdiction of the European Court of Justice and must take into account the judgments of the European Court of Human Rights. If he means the Supreme Court of Judicature which was renamed the Senior Courts when the new Supreme Court came into being, well that was always subject to an appeal the House of Lords, which itself, since 1972, has been bound by the ECJ and since 1998, taking notice of the ECtHR. In short, he is talking nonsense. Again. 

Remind me.  Why was it good idea to appoint a lawyer to this great office of state, even when it ceased to be at the apex of the judiciary?