Complex sentence: Recent excavations in the Covent Garden area have uncovered an extensive Anglo-Saxon settlement, covering about 600,000 square metres, stretching from the present-day National Gallery site in the west to Aldwych in the east.
Split into simpler sentences: Recent excavations in the Covent Garden area have uncovered the extensive Anglo-Saxon settlement. The excavations show that the settlement covered about 600,000 square metres, stretching from the present-day National Gallery site in the west to Aldwych in the east.