I would argue against this, remember that they will still have to pay for a trasin ticket so it would probably make a hughe amount of money, as people are traveling from london to the park (from hethrow, euston train station, the acctual city etc) and universal closes late in florida (I think 10/11 pm) so not only are guest going to be leaving at like 11-12 pm staff will also have to leave after that, then probably hourly or bi hourly trains or just keeping the station open and having the next train at like 6 it will probably have a large amount of traffic throughout the morning for staff, maintanence etc to get to work, then the people turn up arround 9-11 am for the park