Complex sentence: These services are usually from Nottingham or Birmingham New Street, operated by Class 170 "Turbostar" units, although there is one daily service at 20:49 from Manchester Piccadilly operated by a Class 221 "SuperVoyager" unit.
Split into simpler sentences: These services are usually from Nottingham or Birmingham New Street, operated by Class 170 "Turbostar" units, although there is one daily service at 20:49 from Manchester Piccadilly. This service is operated by a Class 221 "SuperVoyager" unit.