 The sovereign , when acting on the Council 's advice , is known as the King @-@ in @-@ Council or Queen @-@ in @-@ Council . The members of the Council are collectively known as The Lords of Her Majesty 's Most Honourable Privy Council ( sometimes The Lords and others of ... ) . The chief officer of the body is the Lord President of the Council , who is the fourth highest Great Officer of State , a Cabinet member and normally , either the Leader of the House of Lords or of the House of Commons . Another important official is the Clerk , whose signature is appended to all orders made in the Council . 
