Complex sentence: An early interest in model aeroplane building, with his brother Sidney, led him, in 1918, to move to London and become a Technical Editor for Benn Brothers Publishers, amongst others, in the fields of aviation and engineering.
Split into simpler sentences: An early interest in model aeroplane building, with his brother Sidney, led him, in 1918, to move to London. Here he became a Technical Editor for Benn Brothers Publishers, amongst others, in the fields of aviation and engineering.