Complex sentence: At 10pm on the Tuesday evening a secondary outbreak occurred which saw the fire spread to buildings on the corner of the High Street and Parliament Square, the blaze starting on the top floor of an eleven-storey building overlooking the Cowgate.
Split into simpler sentences: At 10pm on the Tuesday evening a secondary outbreak occurred which saw the fire spread to buildings on the corner of the High Street and Parliament Square. The blaze here started on the top floor of an eleven-storey building overlooking the Cowgate.