Complex sentence: There have been a number of air crashes whilst the range was in use and there is a record of one which occurred when a Seafire crashed into the railway embankment near Barton Farm at 2.00 pm on Thursday 1st November 1951.
Split into simpler sentences: There have been a number of air crashes whilst the range was in use. One occurred when a Seafire crashed into the railway embankment near Barton Farm at 2.00 pm on Thursday 1st November 1951.