Council. Both Privy Counsellor and Privy Councillor may correctly be used to refer to a member of the Council. The former, however, is preferred by the Privy Council Office, emphasising English usage of the term Counsellor as "one who gives counsel", as opposed to "one who is a member of a council". A Privy Counsellor is traditionally said to be "sworn of" the Council after being received by the sovereign. The sovereign may appoint any person as a Privy Counsellor, but in practice, appointments are made only on the advice of His Majesty's Government. The majority of appointees are senior politicians, including ministers of the Crown, the leader of the main opposition party, the leader of the third-largest party in the House of Commons, the heads of the devolved administrations, and senior politicians from Commonwealth countries. Besides these, the Council includes a small number of members of the Royal Family, some senior British and Commonwealth judges, some senior clergy, and a small number of senior civil servants. There is no statutory limit to the membership of the Privy Council. Members have no automatic right to attend all Privy Council meetings, and only some are summoned regularly to meetings (in practice at the Prime Minister's discretion). The Church of England's three senior bishops – the Archbishop of Canterbury, the Archbishop of York and the Bishop of London – become privy counsellors upon appointment. Senior members of the Royal Family may also be appointed, but this is confined to the Monarch's consort, heir apparent, and heir apparent's spouse. The Private Secretary to the Sovereign is always appointed a Privy Counsellor, as are the Lord Chamberlain, the Speaker of the House of Commons, and the Lord Speaker. Justices of the Supreme Court of the United Kingdom, judges of the Court of Appeal of England and Wales, senior judges of the Inner House of the Court of Session (Scotland's highest law court) and the Lord Chief Justice of Northern Ireland also join the Privy Council ex officio. The balance of Privy Counsellors is largely made up of politicians. The Prime Minister, Cabinet ministers and the Leader of HM Opposition are traditionally sworn into the Privy Council upon appointment. Leaders of major parties in the House of Commons, first ministers of the devolved administrations, some senior ministers outside Cabinet, and on occasion other respected senior parliamentarians are appointed privy counsellors. Because Privy Counsellors are bound