Complex sentence: The fleet in use on the network are Tatra K2 articulated trams from the Czech Republic, delivered in the 1970s and early 1980s, and have been joined by more modern vehicles in recent times.
Split into simpler sentences: The fleet in use on the network are Tatra K2 articulated trams from the Czech Republic, delivered in the 1970s and early 1980s. Later these trams have been joined by more modern vehicles in recent times.