Complex sentence: Although it used parts from older cars, it was considered to be an entirely new tram, and on this basis, when it was retired in 2011, it was gifted to the National Tramway Museum, Crich.
Split into simpler sentences: Although it used parts from older cars, it was considered to be an entirely new tram. On this basis, when it was retired in 2011, it was gifted to the National Tramway Museum, Crich.