 Some of this is on display, along with a hands-on demonstration of safety interlocking.A subsidiary company, SRPS Railtours, operates excursion trains on the main line.These excursion trains are mostly operated within or originating from Scotland.SRPS Railtours uses carriages from the SRPS's large fleet of preserved carriages (currently consisting of Mark 1s and a Mark 2 based at Bo'ness) for its excursions.