Complex sentence: Promoted to full admiral in January 1708, Byng became Commander-in-Chief of the Mediterranean Fleet in January 1709 and went on to become a Lord Commissioner of the Admiralty on the Admiralty board led by the Earl of Orford in November 1709.
Split into simpler sentences: Promoted to full admiral in January 1708, Byng became Commander-in-Chief of the Mediterranean Fleet in January 1709. He became a Lord Commissioner of the Admiralty on the Admiralty board led by the Lord Orford in November 1709.