Complex sentence: The term "junior doctor" now incorporates the grades of Foundation doctor, Specialty registrar; and prior to 2007 included the grades of Pre-registration house officer, Senior house officer and Specialist registrar.
Split into simpler sentences: The term "junior doctor" currently incorporates the grades of Foundation doctor and Specialty registrar. Prior to 2007 it included the grades of Pre-registration house officer, Senior house officer and Specialist registrar.