Complex sentence: The 150 seat grandstand at West Clewes was built just before the Second World War but when football resumed afterwards, Welton finished bottom of the single division league in 1945/46.
Split into simpler sentences: The 150 seat grandstand at West Clewes was built just before the Second World War. When football resumed after the War, Welton finished bottom of the single division league in 1945/46.