Complex sentence: He increased the resident band to full symphonic strength and for more than forty years conducted concerts at popular prices, introducing a wide range of music to London, including many works by young British composers, as well as works by German masters hitherto neglected in England.
Split into simpler sentences: He increased the resident band to full symphonic strength and for more than forty years conducted concerts at popular prices. He introduced a wide range of music to London, including many works by young British composers, as well as works by German masters hitherto neglected in England.