The Newcastle- Man Apt also pick up a call at Dewsbury every hour, instead of the Hull- Piccadilly.
Hull services won’t call at Mosley either!
My thinking behind the plan to drop the Dewsbury stop from the Hull service and transfer it to to the Newcastle service is probably due to decreasing delays and customer dissatisfaction possibly.
The present Dewsbury stopping Hull service is scheduled to call before the passing express Newcastle service. (RTT shows that the time gap between both services passing/ departing in Dewsbury is only approximately 6 minutes) However minor delays are common and a slightly delayed Hull service often leads to the Hull service becoming deliberately extra delayed to wait in Dewsbury station to allow the Newcastle express service to pass through before it.
This causes problems with passengers from Huddersfield or Manchester for example heading for Leeds who often get on the earlier Hull service thinking it arrives into Leeds first as expected when in reality the Newcastle train most often does. Also, causing the Hull service to be deliberately extra delayed to allow the express Newcastle service to pass through can cause further problems down the line further on from Leeds as scheduled time-points allocated to the Hull service passing through a gap can be significantly missed due to it being held at Dewsbury. Also, holding the Hull service at Dewsbury at platform 2 to allow the Newcastle service through the extra/ overtaking line can also congest Dewsbury station itself from a later Calder Valley route type Northern service calling at Dewsbury if it is severely delayed, which can then go on delaying further trains like knocking down dominos.
Additionally, the Newcastle service which starts at Liverpool and takes the newer or common route through Manchester Victoria tends to be less likely to be delayed by minor delays much in comparison to the alternative Hull service which takes the older traditional route via Manchester Piccadilly and is frequently known to be off schedule even by 2-3 minutes which impacts into decreasing the gap between both Hull and Newcastle services. Calling the Newcastle service at Dewsbury even with minor delays would not cause as much problems as albeit the next service calling at Dewsbury is in 7 minutes, it is the Northern Calder Valley service from Southport joining from near Mirfield, thus not causing direct congestion problems such as long queues on the Huddersfield to Leeds corridor, if you can call it that, and thus likely to reduce the domino effect with a delayed train causing the train directly behind it to be delayed and so on with little manoeuvre for flexible control. In addition, the next service to pass through the corridor at Dewsbury after the Northern service is in 10 minutes time, so plenty of time for manoeuvre even if the Northern service is subject to a minor delay.
Although some may say that a switching a service to avoid a delay here will cause the delay to simply move in the same way to a different spot can be be potentially minimised when you have extra room for manoeuvre by not having a potentially direct blockage in the form of a queues on a single corridor and instead better managing delays from using space from services from alternative corridors/ routes/ paths to help reduce the delays in the main corridors, from services in the main corridor being held delayed at slow speed for instance from a delayed service directly in front of it.
E.g. many services stopping and express or semi-express utilise a narrow 2- track corridor such as at various points between Manchester and Huddersfield and thus if a stopping service is delayed and then running in conflict in front of a scheduled express service can itself build up delays from the stopping train stopping every few minutes at stations and unloading and loading times as well as being ordered to ride at a lowered speed to be safe. This then affects more or less every single train directly behind that train and so on even thought he original delay was from a stopper. In comparison, if you move that stopper service to a time slot where fewer trains behind it are less likely to be inconvenienced, such as services behind it coming from an alternative line or route such as from Sheffield Penistone line for instance, it is less likely to cause a direct delay in the form of queues.
In conclusion, I think this is a good improvement. Apologies for any mistakes.