Complex sentence: The BOAC Flamingoes were not popular and following three accidents, one fatal and a lack of spares the airline decided to withdrawn the type and in 1943 the five airworthy aircraft were shipped back to the United Kingdom.
Split into simpler sentences: The BOAC Flamingoes were not popular and following three accidents--one of which was fatal--and with a lack of spares, the airline decided to withdraw the type. In 1943 the five airworthy aircraft were shipped back to the United Kingdom.