Complex sentence: He directed the Liverpool Philharmonic (not then'Royal') in the 1940s and 50s, succeeding the popular Malcolm Sargent, and in 1960 he took on the conductorship of the City of Birmingham Symphony Orchestra when Andrzej Panufnik unexpectedly resigned.
Split into simpler sentences: He directed the Liverpool Philharmonic (not then'Royal') in the 1940s and 50s, succeeding the popular Malcolm Sargent. In 1960 Rignold took on the conductorship of the City of Birmingham Symphony Orchestra when Andrzej Panufnik unexpectedly resigned.