While I don't think this is a Parliamentary train (see my comment at https://news.ycombinator.com/item?id=29288130 https://news.ycombinator.com/item?id=29288130

While I don't think this is a Parliamentary train (see my comment at https://news.ycombinator.com/item?id=29288130 https://news.ycombinator.com/item?id=29288130 ), the earlier Wikipedia link, under https://en.wikipedia.org/wiki/Parliamentary_train#Former https://en.wikipedia.org/wiki/Parliamentary_train#Former mentions Chester - Runcorn as a line "formerly served only by a Parliamentary train" running "Summer Saturdays".