Complex sentence: The wider territory has access to air travel with Ascension island served by RAF Ascension Island and a new airport, financed by the United Kingdom government, under construction on St Helena and due for completion in 2016.
Split into simpler sentences: The wider territory has access to air travel, with Ascension island served by RAF Ascension Island. A new airport, financed by the United Kingdom government, is under construction on St Helena and due for completion in 2016.