Complex sentence: On 1st July all SNBA's A330-300 fleet will have the new SN seats fitted, including lie-flat beds in Business Class and new seats in Economy Class, and some cabin improvements.
Split into simpler sentences: On 1st July all SNBA's A330-300 fleet will have the new SN seats fitted. It included lie-flat beds in Business Class end new seats in Economy Class and some cabin improvements.