Complex sentence: For the convenience of long-distance passengers the A stock is also equipped with luggage racks and umbrella hooks, being the only stock on the system to have these features, despite it being on most National Rail trains.
Split into simpler sentences: For the convenience of long-distance passengers, the A stock is also equipped with luggage racks and umbrella hooks. It is the only stock on the system to have these features, despite its presence on most National Rail trains.