Complex sentence: Two aircraft of the fleet are wet-leased from mainline Lufthansa, with one further A319 being wet-leased from BMI, operating 3 of the 5 daily services between Milan and London.
Split into simpler sentences: Two aircraft of the fleet are wet-leased from mainline Lufthansa. One further A319, wet-leased from BMI, operates 3 of the 5 daily services between Milan and London.