I've just come across this discussion and can add a bit more information.
Until the 1960s some down trains (e.g. the Saturdays only Morecambe train) from Leeds and Bradford combined in platform one. The Bradford loco was detached and shunted into the angle sidings. The Leeds portion was then authorised via Shipley Bingley Junction disc signal 13 to shunt back over the unlocked facing (to the movement) points 8, as allowed at the time by the Signalman's General Instructions (only recently removed from the Train Signalling Regulations). (Up trains for Leeds/Bradford had split at Saltaire originally, then later at Keighley or Skipton.)
Prior to the Beeching closures of local stations in 1965 the general pattern of local train services was hourly - centred on Bradford, not Leeds, with diesel trains to Skipton, Ilkley and Leeds (City) at hourly intervals (half hourly in the peaks, at least Bradford/Skipton). Skipton and Leeds trains connected at Shipley for the relatively few passengers who travelled between Airedale and Leeds. After March 1965 the service pattern changed to services between Leeds and Skipton, Bradford and Ilkley and Bradford and Keighley. Up trains from Skipton to Leeds were routed via platforms 2 (now 5) and 3, while down trains went via platforms 4 and 1 until April 1966, to avoid setting back over Bingley Junction's unlocked facing point 8 on a regular basis as this was not deemed to be a 'shunt' move. Point 8 was then fitted with an FPL (lever 4) and trains then set back into platform 1 via a new ground disc 2 adjacent to disc 13 (which then read into platform 2).
The new platform 5 (now 2) was brought into use on 14th May 1979, initially for down trains only. A new crossover (points 14) was provided near Saltaire and from 9th March 1980 up Leeds trains could use platform 5, crossing back at Guiseley Junction. Up trains for Bradford were routed briefly via platform 1 (using a pilotman), then from 30th March via what was now a single line through platform 2 (platform 1 taken out of use).
On 25th July 1992 a new up platform 1 was provided on the Shipley curve, and platforms 2 and 5 exchanged numbers. I signalled the first train into this new platform!
I hope this has been of interest.
David L (former relief signlman, Shipley).