The High Court of Justice in London, known properly as His Majesty's High Court of Justice in England, together with the Court of Appeal and the Crown Court, are the Senior Courts of England and Wales. Its name is abbreviated as EWHC (England and Wales High Court) for legal citation purposes.
The High Court deals at first instance with all high-value and high-importance civil law (non-criminal) cases; it also has a supervisory jurisdiction over all subordinate courts and tribunals, with a few statutory exceptions, though there are debates as to whether these exceptions are effective.