Complex sentence: When late 1997 came the contract was reassigned to Limebourne, it was being operated by Battersea Garage QB and the double decker school journey was being operated by Nostalgia Bus.
Split into simpler sentences: When late 1997 came the contract was reassigned to Limebourne. The route was operated by Battersea Garage QB and the double decker school journey was being operated by Nostalgia Bus.