Complex sentence: Initially based at Pembrey Airport in West Wales and operating two aeroplanes, Air Wales has expanded to employ over 120 personnel, including 45 flight deck staff, 20 engineers and 20 cabin crew.
Split into simpler sentences: Initially based at Pembrey Airport in West Wales and operating two aeroplanes, Air Wales has expanded dramatically. The airline employs over 120 personnel, including 45 flight deck staff, 20 engineers and 20 cabin crew.