Complex sentence: The Dover Naval Commander-in-Chief, Admiral Max Horton, was responsible for organising the evacuation and he asked if he could meet Hugh Dowding in late June 1940 to prevent the same operational difficulties occurring in future.
Split into simpler sentences: The Dover Naval Commander-in-Chief, Admiral Max Horton, was responsible for organising the evacuation. He asked if he could meet Hugh Dowding in late June to prevent the same operational difficulties occurring in future.