I remember the seaside specials from Leeds Central and Bradford Exchange, via Halifax and the Calder Valley to Blackpool, in the late 50s-early 60s.
Hauled by a variety of Jubilees, Black Fives, Patriots and at times, anything else that would move! Old, ex LMS coaches and even some non-corridor stock.
The slow slog out of Bradford and up Copy Pit, being banked in the rear.
Drawing-up at stations such as Luddenden Foot and Mytholmroyd, where the trains were too long for the platforms.
Taking about 3 hours going, but you didn't worry as you were heading for the seaside. But it seemed so slow coming back!
Then arriving at Blackpool Central's excursion platforms, the queues for the toilets, then across to Woolworth's cafeteria for fish and chips!
Also the occasional excursion round the suburbs to reach Ashburys for Belle Vue and the zoological gardens and fairground. Trying to trace which way the train went through the cat's cradle of lines around east Manchester.
For the slightly posher and with a bit more ready cash, there was even a Saturdays only special from Bradford to Llandudno, which called at all stations from Bradford to Rochdale, and then was scheduled non-stop to Prestatyn. We holidayed in Rhyl in 1957 or so, and I remember being fascinated at going straight through Manchester Victoria, Exchange and Chester without stopping [albeit very slowly!].
Seaside trains were advertised in Halifax's local paper and on what we would now call A5-sized handbills displayed in racks by the booking-office. During the Wakes week, when the mills and the whole town virtually closed-down,you bought your ticket and then queued-up with what seemed most of the residents of the town to gain access to the platforms. You then spent most of the holiday walking the prom at Blackpool or riding the trams, meeting many of the people you'd been working with the previous week! If Morecambe was in effect "Bradford-by-Sea" then Blackpool was home to many folks from Halifax and the Calder Valley during the second week in July.