Prior to the provision of the down curve platform, any Leeds-Skipton trains calling at Shipley had to reverse in and out of the other platforms. The platform cost the PTE £30k and allowed up and down trains to stop at Shipley without the complicated reversals and saving some 5/6 minutes stopping time. The PTE recovered the £30k as a result of the cheaper ongoing train service costs. The shorter journey times and enhanced service (from through trains which previously didn't stop) resulted in large passenger increases and consequent revenue growth which was jam on top.
A proper business case. No need to make up non-financial benefits and no ORR to mess about saying you cant build platforms on curves.
I remember that
Leeds-keighley trains used to go over the north side of the triangle and stop once clear of the north west junction points. (Was that junction called Shipley Bingley Junction?)The guard would be on the 'trailing' cab, and once the signal was off, would buzz and the driver would set back into the platform on the western side of the triangle. Once station work done, the train would just leave towards Keighley. No Saltaire station then of course.
T'other way train would go back into the platform on the western side and stop. driver would change ends and the guard would open the cab door at the 'Bradford' end. blow his whistle and wave his flag, then get in and buzz the driver. He would reverse over the South junction and would stop. Then when he got the road would drive through the East curve and on towards Thackley.
Sometimes the train would stop at the east curve platform, but I dont know why.
Think the buzzer code the guard gave was 3 buzzes. There was a black sticker in the cabs with the buzzer codes. (Maybe modern trains have that too.)
Those were the days when the drivers didnt lower their blinds between the cab and the passenger compartments.