A parliamentary train was a passenger service operated in the United Kingdom to comply with the Railway Regulation Act 1844 that required train companies to provide inexpensive and basic rail transport for less affluent passengers. The act required that at least one such service per day be run on every railway route in the UK.
Such trains are no longer a legal requirement (although most franchise agreements require some less expensive trains). The term's meaning has completely changed, to describe train services that continue to be run with reduced frequency, often to the minimum required one train per week, and without specially low prices, to avoid the cost of formal closure of a route or station, retain access rights, or maintain crew training/familiarity requirements on short sections of track. Such services are sometimes called "ghost trains".[1] Sometimes even the train is omitted, with a bus operating as a cheaper-to-operate "rail replacement service" instead.[2]