Complex sentence: During WW2 Lucas were engaged by Rover to work on the combustion and fuel systems for the Whittle jet engine project making the burners, this came about due to their experience of sheet metal manufacture and CAV for the pumps and injectors.
Split into simpler sentences: During WW2 Lucas were engaged by Rover to work on the combustion and fuel systems for the Whittle jet engine project making the burners. This came about due to their experience of sheet metal manufacture and CAV for the pumps and injectors.